U.S. Marine Corps Staff Sgt. Thomas Beams, right, and Lance Cpl. Sara Tome, mechanics with Marine Medium Tiltrotor Squadron (VMM) 268, Marine Aircraft Group 16, 3rd Marine Aircraft Wing (MAW) walk towards an MV-22B Osprey aircraft to exchange parts at Eastern Sierra Regional Airport Bishop, Calif., during Mountain Exercise (MTNEX) 1-15, Feb. 2, 2015. VMM-268 participated in MTNEX 1-15 in support of 2nd Battalion, 6th Marine Regiment, 2nd Marine Division, with Assault Support operations in a dynamic high altitude training environment. (U.S. Marine Corps photo by Cpl. Allison J. Herman, 3rd MAW Combat Camera/Released)