Abu Musab al-Zarqawi was killed June 7 by U.S. forces in Baqubah, Iraq. For some three years, al-Zarqawi has been the only person affiliated with al Qaeda who has demonstrated the ability to sustain operations in any theater. Other attacks have certainly happened, but their effectiveness has steadily bled away. The July 2005 London bombing not only inflicted a far lower level of devastation than either Spain's March 11 or the U.S. Sept. 11 attacks, but had no appreciable effect on policy. Al-Zarqawi might not have been a global mastermind, bogged down as he was in the Iraqi theater, but his tactics were geared to a holistic strategy of discrediting U.S. forces and sparking conflict between Iraqi Sunnis and Shiites.