Vice Chairman of the Joint Chiefs of Staff Gen. Paul Selva takes a few moments to thank Airman 1st Class Spencer Stone, Specialist Alek Skarlatos and civilian Anthony Sadler as Secretary of Defense Ash Carter looks on prior to an awards ceremony Sept. 17, 2015, in the Pentagon's courtyard honoring them for their heroic actions in stopping a gunman on a Paris-bound train outside of Brussels last month. DoD Photo by Glenn Fawcett (Released)