The 18th Chairman of the Joint Chiefs of Staff Army Gen. Martin E. Dempsey sings during the 21st Anniversary Tragedy Assistance Program for Survivors Honor Guard Gala at the National Building Museum in Washington D.C., March 18, 2015. TAPS is a 24-hour tragedy assistance resource for anyone who has suffered the loss of a military loved one, regardless of the relationship to the deceased or the circumstance of the death. (DoD photo by Mass Communication Specialist 1st Class Daniel Hinton/released)