President Barack Obama and Secretary of Defense Chuck Hagel applaud after Chairman of the Joint Chiefs of Staff General Martin Dempsey delivers a speech during the Armed Forces Farewell Tribute to Secretary of Defense Chuck Hagel on Joint Base Myer-Henderson Hall in Arlington, Va., Jan. 28, 2015. Obama hosted the event, which included remarks by Biden and Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff. (DoD photo by Petty Officer 2nd Class Sean Hurt/Released)