Marines with 2nd Battalion, 24th Marine Regiment, 23rd Marines, 4th Marine Division, rush to get out of an ice-cold stream, as part of a lesson on how to safely cross rushing water, 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)