Jovan Roberts, conservation law enforcement officer, Environmental Affairs, patrols the Marine Corps Air Ground Combat Center's western boundary in Twentynine Palms, Calif., during the King of the Hammers off-road racing and rock-crawling event, Feb. 7, 2018. CLEOs work to protect and preserve the base's many natural and cultural resources. (U.S. Marine Corps photo by Cpl. Dave Flores) - Jovan Roberts, conservation law enforcement officer, Environmental Affairs, patrols the Marine Corps Air Ground Combat Center's western boundary in Twentynine Palms, Calif., during the King of the Hammers off-road racing and rock-crawling event, Feb. 7, 2018. CLEOs work to protect and preserve the base's many natural and cultural resources. (U.S. Marine Corps photo by Cpl. Dave Flores)