USS Gunston Hall Army Command Sgt. Maj. John W. Troxell, the Senior Enlisted Advisor to the Chairman of the Joint Chiefs of Staff, addresses the crew of the amphibious dock landing ship USS Gunston Hall during an all-hands call in Portsmouth, Va., March 23, 2016. Troxell visited the Gunston Hall to highlight the chairman's priorities that include restoring joint readiness, improving joint warfighting and developing leaders. Navy photo by Petty Officer 1st Class Thomas Gagnier SHARE: Download: Full Size (0.87 MB) Credit: Petty Officer 1st Class Thomas Gagnier VIRIN: 160323-N-VG904-076.JPG Photo Gallery