David Letterman, comedian, hugs First Lady Michelle Obama on stage during the ‘Celebration of Service’ comedy show on Joint Base Andrews, Md., May 5, 2016. The show celebrated Military Appreciation Month, the 5th Anniversary of Joining Forces and the 75th Anniversary of the USO. The event was hosted by comedian Jon Stewart and featured remarks from the President, Vice President, the First Lady and Dr. Biden. (U.S. Air Force photo by Airman 1st Class Philip Bryant)