Guardian Challenge continues for security forces
MINOT AIR FORCE BASE, N.D. -- (from left to right) Senior Airman James Rowin, Staff Sgt. Jesse Guerra, Senior Airman Will Benson and Airman 1st Class Tom Donahue, all from the 91st Security Forces Group, run as they close in on the finish line on the obstacle course at Shriever Air Force Base, Colo. on the last day of competition during Guardian Challenge. (U.S. Air Force photo by Senior Airman Danny Monahan)