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University of Maryland engineering student Colin Gore performs a test flight in Baltimore, Wednesday, Feb. 27, 2013, in a one-man, human-powered helicopter that he and fellow students designed and built. The team of undergraduate and graduate students hope to claim the $250,000 American Helicopter Society Sikorsky Prize, which has remained out of reach since it was first offered in 1980. In order to win, a helicopter must fly under human power for at least 60 seconds and momentarily reach an altitude of 3 meters while remaining within a 10 meter square box. (Photo by Patrick Semansky/AP Photo)
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