CEP Senior Director Dr. Hans-Jakob Schindler interviewed: "This is an extraordinary, difficult endeavor because there is this still functioning underground system in particular in the southern half of Gaza. But Sinwar really is the key leader to get here. He was, from the very beginning, part of setting up the terrorist structure of Hamas from 1988 onwards. He was also the founder of the Gaza Hamas intelligence organization that hunts what they call collaborators, those who collaborate with Israel, and executes with them."