https://www.youtube.com/watch?v=vfggwmhcvC0
Sikorsky X2 Technology™ Demonstrator Receives 2011 Collier Award
Sikorsky Aircraft was awarded the Collier Trophy on May 5, 2011 for its revolutionary X2 Technology™ demonstrator.
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Sikorsky X2 Technology™ Demonstrator Receives 2011 Collier Award