CHAIRMAN'S ADDRESS U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, addresses graduates of the New Jersey National Guard Youth ChalleNGe Academy at their graduation in Trenton, N.J., Aug. 29, 2009. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 477261-A-NZV04-484.jpg Photo Gallery