Introduction
The Weather Underground was a radical, militant organization founded in 1969 at the University of Michigan in Ann Arbor. Emerging from opposition to the Vietnam War, the Weather Underground adhered to a communist and anti-war ideology, targeting what it saw as symbols of U.S. military power, authoritarianism, and racism. The Weather Underground was responsible for multiple bombings in the 1970s targeting police, military, government offices, and other symbols of authority.*
The Weather Underground originated as a faction of the antiwar group Students for a Democratic Society (SDS). Bernardine Dohrn, James Mellen, and Mark Rudd belonged to the Third World Marxists faction of SDS and formed what became known as SDS’s “action faction,” advocating street fighting to weaken the United States. At the June 1969 SDS convention, the Third World Marxists published their position paper, “You Don’t Need a Weatherman to Know Which Way the Wind Blows,” in the SDS newspaper, New Left Notes. The paper called for a white revolutionary movement to support black liberation, which the faction called central to SDS’s anti-imperialist fight.* The paper’s title—and the Weather Underground’s name—referenced a lyric from the Bob Dylan song “Subterranean Homesick Blues”: “You don’t need a weatherman to know which way the wind blows.”* This paper became a founding document of the Weather Underground.* The Weathermen, as the group was originally known, formally emerged in December 1969 after a meeting of SDS’s so-called “war council” to discuss the need for further education on the use of firearms and bombs. SDS had collapsed earlier that year and the Weathermen advocated transforming the remnants into an underground guerilla warfare group that would target U.S. sites of power.* The group later changed its name from the Weathermen to the Weather Underground at the behest of members who found the original name sexist.*
The Weather Underground took a more violent approach than SDS as it sought to “dismember and dispose of US imperialism.”* According to some who were present at that December 1969 meeting, there were discussions on the Weathermen’s tactics and willingness to kill in the name of the goals of targeting the U.S. war machine. Police and military became legitimate targets. In January 1970, the Weather Underground divided into three subgroups based in San Francisco led by Howard Machtinger, New York led by Terry Robbins, and a loose network of cells in the Midwest led by Bill Ayers.* According to the group’s 1974 manifesto, Prairie Fire, the group’s goal was “to disrupt the empire ... to incapacitate it, to put pressure on the cracks.”* By 1970, the Weather Underground had inspired the creation of three- to five-person cells across the country that were overseen by the group’s leadership, called the Weather Bureau.* By 1975, the Weather Underground had claimed responsibility for 25 bombings around the United States, including at the U.S. Capitol, the Pentagon, the California Attorney General’s office, and a New York City police station.*
The FBI-New York City Police Anti-Terrorist Task Force—a precursor to the FBI’s Joint Terrorism Task Forces in FBI field offices nationwide—reportedly played a key role in disrupting the Weather Underground’s activities.* The FBI began infiltrating the Weather Underground as early as the 1969 SDS conference and reportedly encouraged the formation of the Weathermen out of a belief that faction represented the least threatening option. Some historians argue the Weather Underground—despite carrying out some prominent bombings in its early years—never achieved a large following and the FBI devoted too many resources and attention to the group.* In 1973, federal prosecutors dropped all major charges against Weather Underground members because of legal questions surrounding FBI tactics—including wiretaps and illegal searches and seizures—while pursuing the group.*
By 1974, the organization’s bombing campaign had slowed significantly. The Weather Underground underwent another name change to the Weather Underground Organization as its leaders struggled with fading relevancy among other far-left radical groups. This led to the creation of the Prairie Fire Organizing Committee, which released the group’s 1974 manifesto in a bid to recapture its influence on the far left.* Internally, the Weather Underground began to fracture over whether to continue embracing violence. The Prairie Fire committee had concluded the Weather Underground needed to win the support of the working class, which set up a division between pro- and anti-violence factions within the group. Original members such as Ayers either left or were expelled.* In December 1976, the Weather Underground underwent a public split over an “inversion” plan for members to come resume public lives. Dohrn accused other members of the group’s Central Committee of being “white, male supremacists” for supporting the plan. Though she had initially supported the plan, she released an audio tape denouncing “the counter‐revolutionary politics” in the Weather Underground and acknowledging the group’s “real” split.* More radical leftists accused the Weather Underground leadership of abandoning armed struggle and diluting their ideology to win over the working class.* The Weather Underground officially disbanded in 1976.* Radical leftist Clayton Van Lydegraf seized control of what remained of the Weather Underground, expelling any remaining original leadership. By 1977, all that remained of the Weather Underground was Van Lydegraf and four followers, all of whom were arrested that November for conspiring to bomb the office of California State Senator John Briggs.*
After spending years in prison, a handful of Weather Underground leaders reformed and took positions as academics and writers. Ayers and Dohrn were indicted in 1970 and spent 10 years in hiding. Charges were eventually dropped because of prosecutorial misconduct.* At the end of his term in January 2001, President Bill Clinton pardoned Weather Underground member Susan L. Rosenberg.* Prominent former Weather Underground member Kathy Boudin, who spent 22 years in prison for her role in an October 1981 Brink’s armored truck robbery in Nanuet, New York, was hired as an adjunct professor at Columbia University’s School of Social Work in 2013.* Despite these reformations, critics continued to view former Weather Underground members with suspicion.*
Leadership
Bernardine Dohrn, James Mellen, and Mark Rudd led the original Weathermen faction of Students for a Democratic Society (SDS), initially known as SDS’s “action faction.” After SDS’s collapse in 1969, Dohrn, Mellen, and Rudd led the newly emerged Weathermen.*
Base of Operations
The Weather Underground undertook actions across the United States. Its leadership was divided into three subgroups based in San Francisco, New York, and the Midwest.*
Membership Size and Relevance
When the FBI began investigating the Weather Underground in 1969, the fledgling guerilla network had approximately 400 members across the United States.* Following the March 6, 1970, accident that destroyed a New York City townhouse and killed three Weather Underground leaders, the group reportedly lost hundreds of supporters and shrunk to about 30 members nationwide.* The Weather Underground officially disbanded in 1976.* Core members began surrendering to authorities in 1977.* Historians have written the FBI and the Nixon administration overestimated the strength and threat posed by the Weather Underground, which elevated the group’s profile beyond what it should have been.*
Some former Weather Underground members reformed after serving time in prison. They drew national attention after their incarceration. For example, Kathy Boudin, who became a fugitive after the March 1970 New York City townhouse explosion and later spent 22 years in prison for her role in a 1981 armored car robbery, was hired as an adjunct professor at Columbia University’s School of Social Work in 2013.* Boudin died in May 2022.* Republicans and other conservatives reignited interest in the Weather Underground during the 2008 presidential campaign after it came to light former Underground leaders Bill Ayers and Bernardine Dohrn had hosted a campaign event for Barack Obama in 1995 when he was running for Illinois state senate.*
Recruitment and Propaganda
The Weather Underground was rooted in communism and promoted an anti-war ideology, particularly focused against the U.S. involvement in the Vietnam War. At the June 1969 SDS convention, Weather Underground forerunner Third World Marxists published their position paper, “You Don’t Need a Weatherman to Know Which Way the Wind Blows,” in the SDS newspaper, New Left Notes. The paper called for a white revolutionary movement to support black liberation, which the faction called central to SDS’s anti-imperialist fight.* On July 25, 1974, the Weather Underground distributed its manifesto, Prairie Fire. The manifesto identified the Weather Underground as a guerilla organization made up of “communist men and women” seeking to “destroy US imperialism.”* The manifesto went on to explain the Weather Underground’s devotion to “armed struggle” in U.S. urban centers.*
Violent Activities
- October 20, 1981: Former Weather Underground members David Gilbert, Judith Alice Clark, Kathy Boudin, and Marilyn Buck—then associated with the May 19 Communist Organization—joined armed members of the Black Liberation Army (BLA) in robbing a Brink’s armored truck in Nanuet, New York. They stole $1.6 million in cash and killed a guard and two police officers. The former Weather Underground members were assigned as the getaway drivers while the BLA members carried out the robbery. Sekou Odinga and Silvia Baraldini were convicted of conspiracy and a related racketeering charge. Edward L. Joseph and Cecil Ferguson were convicted as accessories. Bilal Sunni-Ali and Iliana Robinson were acquitted of all charges. On May 4, 1984, Boudin was sentenced to 20 years to life in prison for her role in the Brink’s robbery.*
- September 5, 1975: A Weather Underground bomb exploded in a bathroom at the Kennecott Corporation in Salt Lake City, Utah, causing an estimated $40,000 to $50,000 in damage. No injuries were reported. The Weather Underground said the bombing was in protest of Kennecott’s support for the current Chilean government and the company’s support for a 1973 military coup that killed President Salvador Allende Gossens. The bombing occurred days before the second anniversary of the coup on September 11.*
- January 29, 1975: A bomb planted by the Weather Underground at the headquarters of the U.S. State Department in Washington, D.C., damaged 20 offices on three separate floors. There were no injuries reported. A second bomb was found and safely detonated hours later at a military induction center in Oakland, California.*
- September 10, 1974: The Weather Underground bombed the Anaconda American Brass Company in Oakland, California. The Weather Underground claimed it targeted Anaconda “in international solidarity with the Chilean people and their revolutionary struggle. The Weather Underground accused Anaconda, along with Kennecott and ITT, of playing “a decisive role in the US-sponsored fascist coup in Chile.”*
- June 13, 1974: Following a warning call from the Weather Underground, several sticks of dynamite exploded at 9:41 p.m. on the 29th floor of the Gulf Oil Corporation building in Pittsburgh, Pennsylvania, causing approximately $1 million in damages. There were no casualties. A letter from the Weather Underground taped to a phone booth in downtown Pittsburgh claimed Gulf Oil had committed “enormous crimes,” including financing “the Portuguese colonial war against the people of Angola in Africa” and exploiting people and resources in 70 countries, including stealing profits from “poor and working people in the US.&rdquo*
- September 28, 1973: A bomb destroyed four rooms in the Latin‐American section of the International Telephone and Telegraph Corporation (ITT) in New York City early in the morning. The building was almost empty at the time and no injuries were reported. An advance call to the New York Times at 2:19 a.m. warned of the explosion “in retaliation of the I.T.T. crimes they committed against Chile.”*
- May 19, 1972: The Weather Underground placed a bomb in the women’s bathroom in the Air Force wing of the Pentagon, causing flooding that destroyed computer tapes with classified information and causing approximately $1 million in damages. There were no injuries due to an advance warning call. The date coincided with the birthdays of Vietnamese leader Ho Chi Minh and Malcolm X.*
- September 18, 1971: After warnings were sent to two New York City newspapers and a radio station, a bomb exploded just after 7:30 p.m. in a bathroom at the State Department of Correction in Albany, New York, causing damage but no injuries. The Weather Underground claimed the bombing was in retaliation for the recapture of the Attica prison facility after a prisoner revolt left 30 prisoners dead in the week.*
- March 1, 1971: At 1:32 a.m., a bomb exploded in a bathroom in Senate wing of the Capitol Building in Washington, D.C., damaging multiple rooms but not causing any injuries. The bomb caused $300,000 in damage. A warning call came in a half hour before the bomb exploded and claimed the bombing was in response to “the Nixon involvement in Laos.” The Weather Underground said it had attacked “the very seat of U.S. white arrogance” in response to Laos.*
- October 8-15, 1970: Over the course of a week, the Weather Underground detonated five bombs at military and law enforcement sites in San Francisco, Seattle, Santa Barbara, California, New York City, and Cambridge, Massachusetts. There was extensive damage but no casualties.*
- October 5, 1970: Ron Fleigelman and a group of Weathermen blew up the Haymarket police officer statue in Chicago that the Weathermen had previously targeted in 1969. The following day, a recording of Bernadine Dohrn warned of more bombings from “Santa Barbara to Boston.”*
- September 12, 1970: The Weathermen aided LSD and psychedelic drug advocate Timothy Leary escape from the California Men’s Colony West minimum-security prison near San Louis Obispo. Leary was serving a 10-year sentence on marijuana possession. The Weather Underground smuggled Leary and his wife to Algeria. Bernardine Dohrn announced that “the Weatherman Underground has had the honor and pleasure of helping Dr. Timothy Leary escape from a POW camp at San Luis Obispo, California.” Leary was later recaptured in Afghanistan.*
- June 9, 1970: A bomb planted in a bathroom damaged offices on the second floor of the New York Police Department headquarters, wounding eight. An anonymous caller warned of the bomb 15 minutes before it went off.*
- March 6, 1970: A Weather Underground bomb exploded in the basement of a townhouse at 18 West 11th Street in New York City’s Greenwich Village, killing three founding members of the group—Diana Oughton, Ted Gold, and Terry Robbins. Two Underground members escaped the explosion—Cathy Wilkerson, whose father owned the house, and Kathy Boudin, daughter of a prominent liberal defense attorney. Following the explosion, police found an additional 57 sticks of dynamite, four completed bombs, detonators, timing devices, and other bomb-making equipment. The Weather Underground had intended to target a dinner dance at Fort Dix in New Jersey. Members of the Weather Underground said after the explosion they were more careful to ensure no one was hurt in their bombings. Almost two months after the explosion, the remaining Weather Underground leadership met in San Francisco. Bernardine Dohrn recorded a message for the media declaring “war” on America. By this point, the Weather Underground had reportedly lost dozens of members and hundreds of supporters.*
- March 2, 1970: Teenagers affiliated with the Weathermen threw two firebombs onto the front porch of a Clevelapnd, Ohio, police detective. The flames were extinguished without casualties. Bill Ayers had allegedly encouraged Ohio members to select a target linked to the prosecution of a leftist accused of killing three Cleveland police officers.*
- February 21, 1970: Led by bomb-maker Terry Robbins, the New York City Weathermen coordinated a series of Molotov cocktail attacks around New York City. Two bombs targeted a New York Police Department vehicle but did not cause any serious injuries or damage. Two bombings targeted military recruiting booths at Brooklyn College. A third bombing targeted the Columbia University Law Library while the fourth bombing targeted the home of a judge in a criminal Trial involving the Black Panther Party, resulting in damage to the home but no casualties.*
- February 16, 1970: At 10:45 p.m., a bomb on a window ledge exploded at the Park Police Station in the San Francisco’s Upper Haight neighborhood, severely wounding officer Brian McDonnell, who died of his wounds two days later. According to the FBI, eyewitnesses linked the Weather Underground to the bombing, but Weather Underground leaders Bill Ayers and Bernardine Dohrn denied their group was responsible for the attack.*
- February 12, 1970: A group of Weathermen set off bombs in the Berkeley police complex parking lot in San Francisco, just after midnight as shifts changed and officers were in the lot. Several officers were wounded but none died. Some Weathermen lamented their failure to kill officers. The Weathermen did not claim credit and their responsibility did not come to light for several years.*
- January 18, 1970: Silas Bissell, a.k.a. Terry Jackson, attempted to blow up an Air Force ROTC building on the University of Washington campus. The bomb did not detonate. Campus police immediately arrested Bissel and his wife, Judith, and charged them with conspiring to damage federal property and possessing an unregistered firearm. The couple fled after posting $50,000 in bail. They later separated and Judith Bissell was arrested in 1979 and sentenced to prison. Silas Bissell was arrested on January 20, 1987, after 17 years in hiding. Bissell claimed the Weathermen had betrayed him and alerted police. Bissell was convicted and sentenced to two years in prison. He was released after 18 months. Bissell died in June 2002 from brain cancer.*
- October 8-11, 1969: The Weather Underground organized a “Days of Rage” protest in Chicago, which was marked by rioting and slogans of “Bring the war home” and “The time has come for fighting in the streets.” Reports vary of 100 to almost 300 people arrested by the end of the protests, but the overall turnout for the protests reportedly disappointed the Weathermen. The following December, the Weather Underground organized a national “war council” meeting of the SDS to discuss the need for further education on firearms and bombs. The council also discussed the need to kill police and target U.S. sites of power.*
- October 6, 1969: The Weathermen blew up a bronze statue in Chicago’s Haymarket Square commemorating the policemen who had died in an 1886 riot.*
Rhetoric
- Weather Underground claim of responsibility for bombing of Anaconda American Brass Company in Oakland, California, September 11, 1974: “We attack Anaconda Corporation in international solidarity with the Chilean people and their revolutionary struggle.”*
Prairie Fire, Weather Underground manifesto, July 1974: “We are a guerrilla organization. We are communist women and men, underground in the United States for more than four years.
“We are deeply affected by the historic events of our time in the struggle against US imperialism. Our intention is to disrupt the empire ... to incapacitate it, to put pressure on the cracks, to make it hard to carry out its bloody functioning against the people of the world, to join the world struggle, to attack from the inside. Our intention is to engage the enemy ... to wear away at him, to harass him, to isolate him, to expose every weakness, to pounce, to reveal his vulnerability.
“Our intention is to encourage the people ... to provoke leaps in confidence and consciousness, to stir the imagination, to popularize power, to agitate, to organize, to join in every way possible the people's day-to-day struggles.
“Our intention is to forge an underground ... a clandestine political organization engaged in every form of struggle, protected from the eyes and weapons of the state, a base against repression, to accumulate lessons, experience and constant practice, a base from which to attack.
“The only path to the final defeat of imperialism and the building of socialism is revolutionary war. Revolution is the most powerful resource of the people. To wait, to not prepare people for the fight, is to seriously mislead about what kind of fierce struggle lies ahead.”*
- Prairie Fire, Weather Underground manifesto, July 1974: “At this early stage in the armed and clandestine struggle, our forms of combat and confrontation are few and precise. Our organized forces are small, the enemy's forces are huge. We live inside the oppressor nation, particularly suited to urban guerrilla warfare. We are strategically situated in the nerve centers of the international empire, where the institutions and symbols of imperial power are concentrated. The cities will be a major battleground, for the overwhelming majority of people live in the cities; the cities are our terrain.”*
- Prairie Fire, Weather Underground manifesto, July 1974: “Attacks by the Weather Underground have been focused and specific. These actions were a catalyst for thousands of politically-directed armed actions between 1970 and 1972, almost all of which complemented mass struggles.”*
- A Weather Underground warning call to the New York Times about a bomb at the International Telephone and Telegraph building in New York City, September 28, 1973: “Take this down because am only going to say this once. I am the Weatherman underground. At the I.T.T.‐American building, a bomb is going to go off in 15 minutes. This is in retaliation of the I.T.T. crimes they committed against Chile.”*
- A Weather Underground warning call to the Kennecott Corporation in Salt Lake City, Utah, shortly before a bomb exploded in the building, September 5, 1975: “Only resistance will win. Call the police and have the building evacuated.”*
- Bernardine Dohrn, after the Weather Underground broke drug advocate Timothy Leary out of prison, September 1970: “Now we are at war.”*
- Weather Underground member Mark Rudd, December 1969: “It’s a wonderful feeling to hit a pig. It must be a really wonderful feeling to kill a pig or blow up a building.”*
- Slogan during Days of Rage protest, October 8-11, 1969: “The time has come for fighting in the streets.”*