U.S. Marine Corps Staff Sgt. Thomas Beams, right, and Sgt. Christian Martinez, mechanics with Marine Medium Tiltrotor Squadron (VMM) 268, Marine Aircraft Group 16, 3rd Marine Aircraft Wing (MAW) replace a panel on an MV-22B Osprey aircraft at Eastern Sierra Regional Airport in Bishop, Calif., during Mountain Exercise (MTNEX) 1-15, Feb. 4, 2015. VVMM-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)