U.S. Army Gen. Stanley A. McChrystal
. Age: 55, born Aug. 14, 1954
. Childhood: grew up in a military family; father fought in Korea and Vietnam and retired as a two-star general; four brothers also joined armed forces .
. Military: West Point graduate, class of 1976; he is a Green Beret and a Ranger; commanded 75th Ranger Regiment and served tours in Saudi Arabia during the Persian Gulf War in 1991; served in Afghanistan as chief of staff of military operations in 2001 and 2002.
. 2003 to 2008, led Joint Special Operations Command, which oversees the military's elite and secretive special operations forces. During Iraq surge, his team killed Abu Musab al-Zarqawi, leader of al-Qaida in Iraq. His leadership is credited with the December 2003 capture of Saddam Hussein.
. Oversaw a task force that was criticized in 2006 for abusing detainees and harsh interrogation methods at Baghdad's Camp Nama.
. March 2007, Pentagon inspector general report singled out McChrystal for his role in the 2004 death of ex-NFL star and U.S. soldier Pat Tillman. The two-year investigation cleared McChrystal of any official wrongdoing, but it faulted him for failing to immediately notify Tillman's family of the military's suspicions that Tillman's death was the result of friendly fire.
. June 2009, replaced Gen. David McKiernan, who had been asked to resign, as top commander in Afghanistan.
. Family: He and his wife, Annie, have an adult son.
Sources: AP; Rolling Stone; U.S. News and World Report; the Guardian; Time