Bettmann/Getty Images
US Air Force photo by Richard Gonzales
Nikita Teryoshin
US Navy photo by Mass Communication Specialist Seaman August Clawson
US Navy photo by Hospital Corpsman 1st Class Kenji Shiroma/Released
Gerald Herbert/AP
Ted Streshinsky/CORBIS/Corbis via Getty Images
US Marine Corps photo by Lance Cpl. Peyton Kahle
US Army photo by Spc. David Poleski
US Air Force photo by Mauricio Campino