The fatal flaw in flight 51–1: Events leading up to the ill-fated challenger launch proved more of a surprise than the disaster itself for what they revealed of NASA´s inability to correct obvious design errors

Roger M. Boisjoly strode angrily down the hall to his office. An engineer with Morton-Thiokol Inc´s Wasatch division, near Brigham City, Utah, Boisjoly was on the team behind the solid-fuel rocket boosters used for all space shuttle lift-offs.