Marines with the Military Working Dog section of the

Marines with the Military Working Dog section of the Provost Marshal’s Office, participate in a K-9 demonstration during the 4th Annual Earth Day Extravaganza aboard the Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., April 13, 2018. The purpose of the extravaganza is to bring families together and educate them on how to be better stewards of the Earth’s resources. (U.S. Marine Corps photo by Lance Cpl. Rachel K. Porter)