Soldiers of the U.S. Army 3rd Infantry Division secure a field near Najaf, Iraq, at sunrise on March 23, 2003. John Moore/AP hide caption
Saddam Hussein
March 20, 2003: U.S. Marines prepare themselves after receiving orders to cross the Iraqi border at Camp Shoup, in northern Kuwait. Eric Feferberg/AFP via Getty Images hide caption
Ray Odierno salutes during his retirement ceremony at Joint Base Myer-Henderson, August 14, 2015 in Arlington, Va. Odierno, who was the Army's 38th Chief of Staff, died on Friday, his family said. Mark Wilson/Getty Images hide caption
In Mosul, reminders of the Islamic State's brutal rule include a school wall covered with drawings showing how militants executed their prisoners. The U.N. says the area around the city holds mass graves where thousands of people were buried. Ari Jalal/Reuters hide caption
"What the American Founding Fathers understood was that institutions were built for human imperfection, not human perfection," Condoleezza Rice says. Ariel Zambelich/NPR hide caption
North Korean leader Kim Jong Un attends the combined fire demonstration of the services of the Korean People's Army in celebration of its 85th founding anniversary in a photo released on April 26. KCNA via KNS/AFP/Getty Images hide caption
Ahmed Chalabi in 2010. Karim Kadim/ASSOCIATED PRESS hide caption
Iraqi Foreign Minister Tariq Aziz in a photo from December 1998 as he stands at attention for the Iraqi national anthem at a conference in Baghdad. Aziz has reportedly died at age 79. Peter Dejong/AP hide caption
Izzat Ibrahim al-Douri, a former member of Saddam Hussein's inner circle (shown here in 2002), leads one of the Sunni armed factions helping ISIS in its fight against the Iraqi government. Jassim Mohammed/AP hide caption
Former President George W. Bush (right) and his father, former President George H.W. Bush, wave as they leave a family wedding in Washington, D.C., in May 2006. Normand Blouin-Pool/Getty Images hide caption