US Air Force AIRMAN 1ST Class Jordan J. Oyloe, from the Air Force Academy, cocks his M16A2 rifle with grenade launcher and prepares to wait to move into position during the combat weapons competition event at Camp Bullis, Texas, during DEFENDER CHALLENGE 2000. Defender Challenge is the annual Air Force wide competition sponsored by Air Force Security Forces. This competition showcases the talents and capabilities of 13 international Security Forces teams in seven physical fitness, base defense and policing skills over six days