Defense Secretary Leon Panetta plans to visit Barksdale Air Force Base Friday. He wants to thank airmen for their efforts in operating, maintaining, and supporting the long-range strike missions performed by the service's B-52, B-2, and B-1 bombers. He also plans to present medals to airmen who have served in Afghanistan and other overseas locations. And, he'll meet with Global Strike Command Headquarters officials about America's global strike capabilities.