MAJ Reed Estrada (USAF) and MSGT Chris Heim (USAF), 2 ASOS, use a communication device to simulate calling in strike aircraft on bombing runs against several target during a training exercise conducted during Operation Joint Guard actions. Operation Joint Guard is a peacekeeping effort by a multinational Implementation Force (IFOR), comprised of NATO and non-NATO military forces, deployed to Bosnia in support of the Dayton Peace Accords