U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, visits with a servicemember participating in Exercise Mojave Viper, a 30-day warfare training immersion program, Twentynine Palms, Calif., June 17, 2008. U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, visits with a servicemember participating in Exercise Mojave Viper, a 30-day warfare training immersion program, Twentynine Palms, Calif., June 17, 2008. SHARE: Download: Full Size (0.72 MB) Tags: photo essays Credit: VIRIN: 072964-L-RIC22-887.jpg Photo Gallery