Philip Boffey 1986 William Broad 1986 David Sanger 1986 "NASA Had Warning of a Disaster Risk Posed by Booster" - 9 Feb. 1986 "Rocket Engineer Describes Arguing Against Launching" - 19 Feb. 1986 "NASA Had Solution to Key Flaw in Rocket When Shuttle Exploded" - 9 Feb. 1986 The New York Times
