Secretary Gates listens to a question from AP journalist Anne Flaherty. Secretary of Defense Robert M. Gates listens to a question from AP journalist Anne Flaherty while traveling onboard a U.S. Air Force E-4B National Airborne Operations Center aircraft en route to Lima, Peru, as part of a four day trip to South America on April 13, 2010. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 500252-Y-WWE34-809.jpg Photo Gallery