OPENING REMARKS U.S. Defense Secretary Robert M. Gates speaks to troops on Bagram Air Field, in Afghanistan, March 7, 2011. Gates is in Afghanistan to visit troops, meet with Afghan President Hamid Karzai and talk with NATO military leaders about progress being made toward transitioning security responsibility to Afghan forces, set to start in July. SHARE IMAGE: Download Image: Full Size (0.07 MB) Photo By: VIRIN: 756146-R-CGN56-690.jpg Photo Gallery