Bill Dana with the X-15 on the dry lake bed at the Dryden Flight Research Center at Edwards Air Force Base, Calif., in 1967. Dana died Tuesday at age 83. (AP Photo/NASA, File)

Bill Dana with the X-15 on the dry lake bed at the Dryden Flight Research Center at Edwards Air Force Base, Calif., in 1967. Dana died Tuesday at age 83. (AP Photo/NASA, File)

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