House of Pain tests defenders’ endurance
Staff Sgt. Joseph Kaczynski, a member of the 51st Security Forces Squadron, runs sprints during a House of Pain training event in the fitness center at Osan Air Base, Republic of Korea, Feb. 27, 2014. House of Pain mimics training used by the U.S. Marine Corps and completion is mandatory for all 51st SFS personnel. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)