Lance Cpl. Jalille Ryan Cristobal, tank mechanic, and Lance Cpl. Alan Kuang, driver, 1st Tank Battalion, grapple during a physical training competition as part of the battalion’s operational pause at Del Valle Field aboard the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Nov. 29, 2016. (Official Marine Corps photo by Cpl. Thomas Mudd/Released) - Lance Cpl. Jalille Ryan Cristobal, tank mechanic, and Lance Cpl. Alan Kuang, driver, 1st Tank Battalion, grapple during a physical training competition as part of the battalion’s operational pause at Del Valle Field aboard the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Nov. 29, 2016. (Official Marine Corps photo by Cpl. Thomas Mudd/Released)