Men pray at a cemetery for Shia volunteer fighters killed fighting with ISIS militants in the Wadi al-Salam, or "Valley of Peace" cemetery in Najaf, 100 miles (160 kilometers) south of Baghdad, Iraq. (AP/Anmar Khalil)
Iraq +15

15 Years Later, the World Is Still Reeling From the Decision to Invade Iraq

Brushing aside warnings that he was about to unleash Armageddon in the Middle East, George W. Bush launched an unprovoked attack on Iraq on March 19-20, 2003, the ramifications of which we are still grappling with today