Change of command in Iraq

David Petraeus and Raymond  Odierno
A picture combo shows U.S. Army Gen. David Petraeus (on the left), commander of Multi-National Forces-Iraq, holding a press conference in Baghdad on December 5, 2007 and U.S. Lt. Gen. Raymond Odierno (on the right), currently the number two commander of U.S.-led forces in Iraq, addressing the press at the National Press Club in Washington on October 2, 2007. Petraeus will hand over command of U.S.-led forces in Iraq to Odierno on September 16.
NICHOLAS KAMM/AFP/Getty Images

U.S. Army Gen. David Petraeus, who is credited with curbing sectarian violence in Iraq, is expected to hand over his role to U.S. Lt. Gen. Raymond Odierno, who's currently the number two commander of US-led forces in Iraq.

Patraeus will take over as the new chief of Central Command, with responsibility for U.S. troops from the Horn of Africa to Central Asia, including live conflicts in Afghanistan and Iraq.

Midday explores how Petraeus changed the war in Iraq, and what will happen when he hands off his responsibilities to Odierno.