By 2004, Zarqawi had already claimed 25 attacks against US and its allied Iraqi forces. Zarqawi is personally responsible for the beheading and murder of American [[Nicholas Berg]].<ref>http://www.globalsecurity.org/military/world/para/zarqawi.htm</ref> His attacks eventually occurred daily until he was killed by a precision U.S. airstike in 2006. | By 2004, Zarqawi had already claimed 25 attacks against US and its allied Iraqi forces. Zarqawi is personally responsible for the beheading and murder of American [[Nicholas Berg]].<ref>http://www.globalsecurity.org/military/world/para/zarqawi.htm</ref> His attacks eventually occurred daily until he was killed by a precision U.S. airstike in 2006. |