President Barack Obama delivers his address to 5,000 service members from all five branches during the 2013 Commander in Chief inaugural ball at the Walter E. Washington Convention Center in Washington Jan. 21, 2013. Throughout the 57th Presidential Inauguration, the Obama and Biden families have taken the opportunity to highlight the spirit of service and selflessness seen everyday U.S. military men, women and their families. (U.S. Air Force photo by Chief Master Sgt. Robert W. Valenca/Released)