Ex-U.S. detainees now ISIS leaders

aka Abu Bakr al-Baghdadi

Al-Baghdadi is the caliph (leader) of ISIS. He was born in Samarra, and educated in Islamic history and, possibly, Sharia law at the University of Baghdad. He's now in his early 40s and married to possibly two wives, with at least a couple of kids.

U.S. forces detained him as a "civilian internee" in what the Department of Defense says was his hometown of Fallujah, and was imprisoned Feb. 4, 2004 at Camp Bucca, a U.S. prison camp, in Umm Qasr, Iraq. He was released from U.S. custody in early December. Soon after, he may have joined Abu Musab al-Zarqawi's Mujahideen Shura Council, an umbrella organization of Sunni insurgent groups that included al-Qaeda in Iraq. He rose in power and was third in command when the top two leaders of ISIS in Iraq were killed in early 2010.

At least 12 of the top leaders of ISIS served time at Camp Bucca, known as the largest, and one of the toughest, American prisons in Iraq.

Fadel Ahmad Abdullah al-Hiyali

aka Abu Muataz aka Abu Muslim al-TurkmaniFadel Ahmad Abdullah al-Hiyali aka Abu Muataz aka Abu Muslim al-Turkmani

Fadel Ahmad Abdullah al-Hiyali was in Senior Special Forces and military intelligence under former Iraqi leader Saddam Hussein. He may be the ISIS Governor of Deiz Azzour, Syria.

Adnan Ismail Najem al-Bilawi

aka Abu Abed Abdul Rahman al-Bilawi

Adnan Ismail Najem al-Bilawi was a captain in Saddam Hussein's military and military chief of ISIS. He was killed in action in Mosul, Iraq on June 5, 2014. He was believed to have played a significant role in tactical strategy for the assault on Mosul, which has since been called "Bilawi's revenge" in his honor.

Samir Abd Muhammed al-Klifawi

aka Haji Bakr

Samir Abd Muhammed al-Klifawi was Al-Baghdadi's assistant and former army colonel under Saddam Hussein in Iraq and supervised ISIS in Syria. He was killed in action in Syria in 2014.

Abdullah Ahmed al-Meshdani aka Abu Qasim

aka Abu Ali, Abu Lu'ay

Abdul Wahed Khutnayer Ahmed is responsible for hosting foreign fighters.

Abdul Wahed Khutnayer Ahmed

aka Abu Ali, Abu Lu'ay

Abdul Wahed Khutnayer Ahmed is responsible for general security for ISIS.

Abdul Rahman al-Afari

aka Abu Suja

Abdul Rahman al-Afair coordinates follow-up on widows, martyrs, prisoners.

Adnan Latif Hamid al-Sweidawi

aka Abu Abdul Salem aka Abu Muhanedal-Sweidawi aka Abu Ayman al-Iraqi

Adnan Latif Hamid al-Sweidawi was a military officer under Saddam Hussein. Now he heads the ISIS military council and is Governor of Anbar Province in western Iraq.

Fares Raif al-Naima

aka Abu Shema

Fares Raif al-Naima is the guardian of warehouses.

Abu Muhammad al Adnani al-Shami

Abu Muhammad al Adnani al-Shami is the ISIS spokesman in Syria.