Lt. Cmdr. Martin Kelly (left), a system battalion surgeon, and Chief Augusto Gador (right), the battalion chief, both with 2nd Battalion, 24th Marine Regiment, 23rd Marines, 4th Marine Division, administer aide to a Marine with blistered heals after a conditioning hike during Mountain Exercise 3-18, at Mountain Warfare Training Center, Bridgeport, Calif., June 21, 2018. After completing Integrated Training Exercise 4-17 last year, 2nd Bn., 24th Marines took part in MTX 3-18 to further develop small-unit leadership and build an understanding of the different climates and scenarios they could face in the future. (U.S. Marine Corps photo by Cpl. Dallas Johnson)