Air Force Staff Sgts. Charles Womack and Brandon Nicolas, 349th Maintenance Squadron crew chiefs, replace a panel on the boom of a KC-10 Extender at Travis Air Force Base, Calif., Feb. 7, 2016. This week, the reservists are working alongside hundreds of their fellow Citizen Airmen from the 349th Maintenance Group to support Wrench Week 2017. The event offers opportunities for reservists to accomplish ancillary training, upgrade training, and gain practical experience necessary to sharpen their primary job skills. (U.S. Air Force photo by Ken Wright)