From Abacus Software. The Lock-On killer.
http://gamespot.com/gamespot/stories...839703,00.html
The add-on features detailed visual and flight models of 11 modern military aircraft, including the one-seat F-15C Eagle, the two-seat F-15E Eagle, three versions of the one-seat F-16C Falcon, four versions of the two-seat F-16D Falcon, the A-10 Thunderbolt II, and the B-2 Spirit stealth bomber.