Texas State Park Hueco Tanks volunteer guide Ed Anthony, (right), a native of Santa Monica, Calif., tells his morning tour group about the Klien Cholla cactus during a tour, Dec. 6. Native to New Mexico, this cactus made its way to Hueco Tanks by way of the Jornada Mogollon Native Americans, who settled this land more than 1,000 years ago, and is prized for its sweet fruit and resistance to freezing in cold weather. (U.S. Army photo by Sgt. James Avery, 16th Mobile Public Affairs Detachment)