Airman 1st Class Jonathan Centers, an aircraft mechanic from the Aero Repair Shop at March Air Reserve Base, Calif., uses a ratchet wrench Feb. 3 to install a heat shield on a KC-135 Stratotanker refueling aircraft main wheel. March ARB, located in Southern California, is home to the largest air mobility wing in the Air Force Reserve Command. It also is home to units from the Army Reserve, Navy Reserve, Marine Corps Reserve and Air National Guard. (U.S. Air Force photo/Val Gempis)