Sgt. Aaron Medlin, squad leader, 3rd Battalion, 4th Marines, 7th Regiment, enjoys a carnival ride with his daughters during the Earth Day Extravaganza at Lincoln Military Housing Athletic Field at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., April 21, 2017. LMH and Natural Resources and Environmental Affairs hosed the event to encourage Combat Center residents to be more aware of the environment. (U.S. Marine Corps photo by Lance Cpl. Dave Flores) - Sgt. Aaron Medlin, squad leader, 3rd Battalion, 4th Marines, 7th Regiment, enjoys a carnival ride with his daughters during the Earth Day Extravaganza at Lincoln Military Housing Athletic Field at Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., April 21, 2017. LMH and Natural Resources and Environmental Affairs hosed the event to encourage Combat Center residents to be more aware of the environment. (U.S. Marine Corps photo by Lance Cpl. Dave Flores)

A biologist with Natural Resources and Environmental Affairs places desert tortoises into a carrying case on a helicopter during the Desert Tortoise translocation, April 10, 2017, which was facilitated by the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif. The translocation, in accordance with the U.S. Fish and Wildlife Service-signed Biological Opinion, serves as a negotiated mitigation to support a congressionally mandated land expansion which, will afford the Combat Center the ability to conduct Large Scale Exercise training of a Marine Expeditionary Brigade-level force. (U.S. Marine Corps photo by Cpl. Medina Ayala-Lo) - A biologist with Natural Resources and Environmental Affairs places desert tortoises into a carrying case on a helicopter during the Desert Tortoise translocation, April 10, 2017, which was facilitated by the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif. The translocation, in accordance with the U.S. Fish and Wildlife Service-signed Biological Opinion, serves as a negotiated mitigation to support a congressionally mandated land expansion which, will afford the Combat Center the ability to conduct Large Scale Exercise training of a Marine Expeditionary Brigade-level force. (U.S. Marine Corps photo by Cpl. Medina Ayala-Lo)