Army Command Sgt. Maj. John W. Troxell, third senior enlisted advisor to the chairman of the Joint Chiefs of Staff, introduces his sister to the first senior enlisted advisor to the chairman, retired Army Sgt. Maj. Joe Gainey, and recently retired Marine Corps Sgt. Maj. Bryan B. Battaglia, the second senior enlisted advisor to the chairman, during a reception following the change of responsibility ceremony on Joint Base Myer-Henderson Hall, Va., Dec. 11, 2015. DoD photo by Navy Petty Officer 2nd Class Dominique A. Pineiro