Attending the Air Tattoo on static display this year will be a medical evacuation-configured UH-60A+ model on the strength of C/1-214th AVN (AA), a US Army Europe unit stationed at Grafenwöhr, Germany. A supremely rugged and versatile battlefield helicopter, the US Army's Sikorsky UH-60 Black Hawk has been a great workhorse on worldwide operations for many years. The prototype of this twin-engined machine flew inaugurally in 1974 and service entry with the Army occurred five years later. Black Hawks have been used in the invasions of Grenada and Panama, in both Iraq wars, in Somalia, the Balkans, Afghanistan and many other theatres. The type's primary missions in standard UH-60 form are tactical transport and medical evacuation; however, many other derivatives of Sikorsky's H-60 family have been developed for use not just by the US Army, but also the Air Force, Navy and Coast Guard. For example, it serves the Air Force in HH-60 Pave Hawk form as a combat rescue platform, and the Navy as the MH-60 and SH-60 Seahawk. A highly-modified, 'stealthy' US Army Black Hawk was among the helicopters employed during the mission in 2011 that killed Osama bin Laden.