US Army Lt. Gen. Lloyd Austin (L), Gen. David H. Petraeus (2nd L), the top commander of the Multi-National Force Iraq, and the crew assigned to a C-130 Hercules aircraft pose with US Sen. Barack Obama (D-IL) (4th R) in front of a C-130 aircraft at the Baghdad International Airport in Iraq, following Obama's arrival to Iraq on July 21, 2008. [Agencies]