The U.S. Air Force's F-16D Automatic Collision Avoidance Technology (ACAT) aircraft takes off from Edwards Air Force Base on a flight originating from NASA’s Dryden Flight Research Center. NASA Dryden is working with the Air Force Research Laboratory in the ACAT Fighter Risk Reduction Project to develop collision avoidance technologies for fighter/attack aircraft that would reduce the risk of ground and mid-air collisions.