Staff Sgt. John Borowski steps to the last hurdle of the Tough Nut obstacle during Defender Challenge '99 at Lackland Air Force Base, Texas, on Nov. 1, 1999. Defender Challenge is an all-star competition featuring Security Forces from Air Force major commands and the Royal Air Force Regiment. Teams compete in a fitness challenge, handgun events, combat rifle, combat weapons and nighttime tactical events. Borowski is a member of the Pacific Air Forces team.