Tanzim Qaidat al-Jihad fi Bilad al-Rafidayn, more commonly known as Al-Qaeda in Iraq, was a Salafi jihadist organization affiliated with Al-Qaeda. It was founded on 17 October 2004, and was led by Abu Musab al-Zarqawi and Abu Ayyub al-Masri until its disbandment on 15 October 2006.
US Navy Seabees during the Second Battle of Fallujah (November 2004)
The Al-Askari Mosque, one of the holiest sites in Shia Islam, after the first attack by Al-Qaeda in Iraq in 2006
Shosei Koda before his beheading
Car bombings were a common form of attack in Iraq during the Coalition occupation
Abu Musab al-Zarqawi, born Ahmad Fadeel al-Nazal al-Khalayleh, was a Jordanian jihadist who ran a terrorist training camp in Afghanistan. He became known after going to Iraq and being responsible for a series of bombings, beheadings, and attacks during the Iraq War, reportedly "turning an insurgency against US troops" in Iraq "into a Shia–Sunni civil war". He was sometimes known by his supporters as the "Sheikh of the slaughterers".
American hostage Nick Berg seated, with five men standing over him. The man directly behind him, alleged to be Zarqawi, is the one who beheaded Berg.
Colin Powell's U.N. presentation slide showing Al-Zarqawi's global terrorist network