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ARLINGTON, VA - SEPTEMBER 17: (L - R) U.S. Army Specialist Alek Skarlatos, Airman 1st Class Spencer Stone, and Anthony Sadler attend an awards ceremony at the Pentagon September 17, 2015 in Arlington, Virginia. Stone received the Airman's Medal and the Purple Heart medal, Skarlatos received the Soldier's Medal and Sadler received the Defense Department Medal for Valor after the three men helped overpower gunman Ayoub El-Khazzani, 25, after he opened fire on a Thalys train traveling from Amsterdam to Paris on August 21. (Photo by Chip Somodevilla/Getty Images)

ARLINGTON, VA - SEPTEMBER 17:  (L - R) U.S. Army Specialist Alek Skarlatos, Airman 1st Class Spencer Stone, and Anthony Sadler attend an awards ceremony at the Pentagon September 17, 2015 in Arlington, Virginia. Stone received the Airman's Medal and the Purple Heart medal, Skarlatos received the Soldier's Medal and Sadler received the Defense Department Medal for Valor after the three men helped overpower gunman Ayoub El-Khazzani, 25, after he opened fire on a Thalys train traveling from Amsterdam to Paris on August 21.  (Photo by Chip Somodevilla/Getty Images)