EIELSON AIR FORCE BASE, Alaska -- Staff Sgt. Jeffrey Martinez, a crew chief from Dyess Air Force Base, Texas, runs down the flightline to marshal a B-1 Lancer June 18. The Lancer serves as the supersonic-capable component of the Air Force's long-range bomber force. The B-1s are participating in RF-A 08-3, a series of Pacific Air Forces commander-directed field training exercises for U.S. forces. The exercises provide joint offensive counter-air, interdiction, close air support, and large force employment training in a simulated combat environment. (U.S. Air Force photo by Airman 1st Class Christopher Griffin)