“No matter that astronauts and cosmonauts had perished in precisely designed and carefully tested machines. Solid engineering could always provide a safety margin, because the engineers believed, there was complete safety in numbers.” MatterNumbersMachinesSafetyAviationEngineeringEngineersTestedAstronautMarginsSafety In Numbers Book:This New Ocean: The Story of the First Space Age Source: This New Ocean: The Story of the First Space Age