X-37 NASA's X-37 vehicle will test and validate technologies in the environment of space as well as test system performance of the vehicle during orbital flight, reentry and landing. DART Demonstration of Autonomous Rendezvous Technology: Developed by Orbital Sciences, DART will flight demonstrate in-orbit autonomous rendezvous and close proximity operations as part of NASA's 2nd Generation Reusable Launch Vehicle (RLV) Risk Reduction Initiative. PAD Pad Abort Demonstrator: Developed by Lockheed-Martin, the launch pad abort demonstrator will be used as a test-bed to demonstrate crew escape technologies and to validate analytical models necessary for future crew escape systems.