160525-N-AT895-114 TWENTYNINE PALMS, Calif. (May 25, 2016) Chief of Naval Operations (CNO) Adm. John Richardson and Commandant of the Marine Corps Gen. Robert Neller observe Marines and Sailors with Kilo Company, 3rd Battalion, 2nd Marines attack Range 400 at Marine Corps Air Ground Combat Center Twentynine Palms. Range 400 is a complex training range designed to test and improve combat readiness and skills. (U.S. Navy photo by Mass Communication Specialist 1st Class Nathan Laird/Released)