(Left) Airmen 1st Class Jason Rembert and Brittany Hayes, Air Force Financial Service Center finance comptrollers, perform changing of the guard duty near the base flagpole here, Sept. 18. Changing of the guard is a formal ceremony that is executed differently among the world’s military forces. Ellsworth Air Force Base volunteers performed the duty throughout the day to honor Prisoners of War/Missing in Action Recognition Day. (U.S. Air Force photo by Airman 1st Class Corey Hook)(Released)