Marines with Marine Corps Air Station Yuma's Range Maintenance section aid wildlife biologists from the Arizona Department of Game and Fish and the U.S. Fish and Wildlife Service in building a temporary holding pen on the Barry M. Goldwater Range, Nov. 19. The pen will hold six to eight of the endangered Sonoran Pronghorn after they are relocated to the area in December. The animals will remain in the pen long enough to recover from the sedatives they'll be given before being flown to the location, which will keep them safe from the predators in the area.