Ahmed Yassin
On March 31, 2004 - Iraqi insurgents from the Brigades of Martyr Ahmed Yassin in Fallujah ambushed a convoy containing four American private military contractors employed by Blackwater USA, who were at the time guarding a convoy carrying kitchen supplies to a military base, for the catering company Eurest Support Services Intelligence reports concluded that Ahmad Hashim Abd al-Isawi was the mastermind behind the attack.