Army Command Sgt. Maj. John W. Troxell, senior enlisted advisor to the chairman of the Joint Chiefs of Staff, pauses to feed a horse as he visits soldiers assigned to the 3rd U.S. Infantry Regiment, known as "The Old Guard," at Joint Base Myer-Henderson Hall, Va., Jan. 30, 2017. During his visit, Troxell met with the Caisson Platoon, sentinels for the Tomb of the Unknown Soldier and the 947th Military Police Detachment. The sentinels are assigned to the 4th Battalion. DoD Photo by Navy Petty Officer 2nd Class Dominique A. Pineiro

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