It's not rocket science--or is it?
D000060:Accidents, Aviation / Q000331:legislation & jurisprudence* / Q000401:mortality; D000062:Accidents, Occupational; D004868:Equipment Failure; D019544:Equipment Failure Analysis; D006801:Humans; D008420:Manufactured Materials; D008422:Materials Testing; D018570:Risk Assessment; D013026:Space Flight; D018531:Spacecraft; D014481:United States; D018557:United States National Aeronautics and Space Administration / Q000331:legislation & jurisprudence* / Q000458:organization & administration