US Air Force (USAF) STAFF Sergeant (SSGT) Paul Ruhbusch, 31st Security Forces Squadron (SFS), armed with a 5.56 mm M16A2 rifle, participates in vehicle assault training as part of a tactics-training course held at Aviano Air Base (AB), Italy. The weeklong course was developed to establish a better working relationship between members of the Office of Special Investigations (OSI), the 31st SFS, and the Italian Air Force Carabineri