British Forces Corporal Mark Holyday (Center), a team member representing the Royal Air Force Regiment, scrambles to the rally point on the Combat Rifle competition course during Exercise DEFENDER CHALLENGE 2000 at Lackland Air Force Base, Texas, on October 31st, 2000. DEFENDER CHALLENGE is the annual Air Force competition sponsored by Air Force Security Forces. This competition showcases the talents and capabilities of 13 international Security Forces teams in seven physical fitness events, base defense and policing skills over six days