Support WBURRemembering Roger Boisjoly: He Tried To Stop Shuttle Challenger LaunchPlay03:59Download AudioHoward BerkesFebruary 06, 2012 ShareEngineer Roger Boisjoly examines a model of the O-Rings, used to bring the Space Shuttle into orbit, at a meeting of senior executives and academic representatives in Rye, New York in Sept. 1991. (AP)