Since May 1, U.S. intelligence and special operations forces, or foreign forces working with U.S. intelligence and special operations forces, have killed the leading terrorists who targeted and killed more Americans than any others in the past 25 years. Not only did the U.S. kill Osama Bin Laden on May 1, but also took out "removed from the battlefield" three of the jihadists they had identified as potential successors to bin Laden in the hours after the attack. Also, Somali forces loyal to the U.S. killed the mastermind of al-Qaida's East Africa embassy bombings. With 224 killed, 12 of them Americans, the attacks in Nairobi and Dar es Salaam were the group's deadliest attack before 9-11.
As for Moammar Gadhafi, it was his intelligence service that has been strongly linked to the attack on PanAm 103 in December 1988, which until September 11 was the single worst terrorist attack directed against the U.S., killing 269 people. (Gadhafi was also believed responsible for the deaths of 171 people on UTA 772 over the Congo.)