Report of the PRESIDENTIAL COMMISSION on the Space Shuttle Challenger Accident

Following the discovery of the STS 51-C (flight 15) O-ring erosion and blow-by, Lawrence Mulloy sent this certified urgent

Following the discovery of the STS 51-C (flight 15) O-ring erosion and blow-by, Lawrence Mulloy sent this certified urgent " message to the solid rocket motor manager , larry wear. this was passed on thiokol as direction prepare a detailed briefing o-ring problems for next flight readiness review.

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