Sheikh Ahmed Yassin, spiritual leader of the Islamic militant group Hamas, is seen at Palestine Hall in Gaza City Friday, August 21, 1998. Yassin, the founder and leader of the Hamas militant group, was killed by missiles fired from Israeli helicopters as he left a mosque at daybreak Monday, March 22, 2004, witnesses said. Hamas confirmed the death in an announcement broadcast over mosque loudspeakers. (AP Photo/Adel Hana)