One of two <a href="https://en.wikipedia.org/wiki/Rockwell-MBB_X-31" class="extiw" title="en:Rockwell-MBB X-31">Rockwell-MBB X-31</a> Enhanced Fighter Maneuverability Demonstrator aircraft (top), flown by an international test organization at <a href="https://en.wikipedia.org/wiki/NASA" class="extiw" title="en:NASA">NASA</a>'s <a href="https://en.wikipedia.org/wiki/Dryden_Flight_Research_Center" class="extiw" title="en:Dryden Flight Research Center">Dryden Flight Research Center</a>, <a href="https://en.wikipedia.org/wiki/Edwards_Air_Force_Base" class="extiw" title="en:Edwards Air Force Base">Edwards Air Force Base</a>, <a href="https://en.wikipedia.org/wiki/California" class="extiw" title="en:California">California</a>, is seen here during a research flight over the desert floor. The X-31 had a three-axis <a href="https://en.wikipedia.org/wiki/thrust_vectoring" class="extiw" title="en:thrust vectoring">thrust vectoring</a> system, coupled with advanced flight controls, to allow it to maneuver tightly at very high angles of attack.
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