US Air Force (USAF) 36th Fighter Squadron (FS) and 36th Aircraft Maintenance Unit (AMU) personnel sit dressed in Mission-Oriented Protective Posture 4 (MOPP-4) gear inside a Hardened Aircraft Shelter (HAS) as they wait for the general release call from an alarm black condition during Exercise BEVERLY BULLDOG 04-03, being conducted at Osan Air Base (AB), Kyonggi-do Province, Republic of Korea (KOR)