Soaring high
The X-51A WaveRider, attached to the inner wing of a B-52 Spirit, flew its fourth and final mission May 1, 2013, over the Point Mugu Naval Air Warfare Center Sea Range, Calif., The test team achieved a record- setting 210 seconds of air-breathing hypersonic flight. Flight testers from Edwards Air Force Base, Calif., played a vital role in the program's success. (U.S. Air Force photo/Bobbi Zapka)