Airman 1st Class Christopher Yanes, a maintenance qualification training program student, removes the truck level switch of a landing gear during a hands-on training session at Fairchild Air Force Base, Wash., June 28, 2013. The truck level switch is a crucial component of the landing gear, completing a circuit which ensures the gear is safe to raise into the wheel well. (U.S. Air Force photo by Airman 1st Class Janelle Patiño)