After a half-mile uphill litter carry race in the Self-Aid/Buddy Care challenge, the 507th Air Refueling Wing Security Forces Squadron team wills themselves to the finish line during the Nov. 10 Defender Challenge competition. Six teams from Tinker’s 72nd Security Forces, Altus’ 97th SFS and Tinker’s 507th ARW/SFS were pushed to the limits in various combat skills during the first event of its kind here since the 1980s. . (Air Force photo by Margo Wright)