Defense Secretary Chuck Hagel, far left, President Barack Obama, Vice President Joe Biden and Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, stand and place their hands over their heart and salute during the playing of the national anthem during the Armed Forces Farewell Tribute to Hagel on Joint Base Myer-Henderson Hall in Arlington, Va., Jan. 28, 2015. (Photo by Master Sgt, Adrian Cadiz)(Released)