High Alpha Research Vehicle
The High Alpha Research Vehicle is a modified American McDonnell Douglas F/A-18 Hornet used by NASA in a three-phase program investigating controlled flight at high alpha (angle of attack) using thrust vectoring, modifications to the flight controls, and with actuated forebody strakes. The program lasted from April 1987 to September 1996.
Source: Wikipedia — High Alpha Research Vehicle (CC BY-SA 4.0)