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Astronaut candidate Guion S. Bluford and Aviation Safety Officer Charles F. Hayes got a unique perspective of their environment during a zero gravity flight. They are aboard a KC-135 aircraft, which flies a special pattern repeatedly to afford a series of 30-seconds-of-weightlessness sessions. Bluford and Hayes are being assisted by C. P. Stanley of the photography branch of the photographic technology division at Johnson Space Center (JSC). Some medical studies and a motion sickness experiment were conducted on this particular flight. Bluford is one of 20 scientist-astronaut candidates who began training at JSC in July of 1978.