John Lizama, a dog handler with the U.S. Department of Agriculture, guides working dog Spencer around a U.S. Air Force Humvee to check for brown tree snakes before the vehicle is loaded onto an Air Force C-130 Hercules aircraft at Andersen Air Force Base, Guam, Nov. 14, 2013, for a mission in support of Operation Damayan. U.S. military forces were deployed to the Philippines to support humanitarian efforts in response to Typhoon Haiyan.