A runner from the 913th Airlift Group prepares to hydrate during a 24-hour vigil, at Little Rock Air Force Base, Ark., Sept. 15, 2017. Runners from all the units on base volunteered to runs laps in 1-hour time slots with the POW/MIA flag to keep it moving for 24 hours in observance of National POW and MIA Recognition Day. (U.S. Air Force photo by Master Sgt. Jeff Walston/Released)