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Utah engineers' warning was ignored before Challenger explosion 30 years ago - The Salt Lake Tribune
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Amazon.com: Beaver Island Parts Co. Fits Pentair & Sta-Rite Challenger All Models (Except 5HP), Pump O-Ring Seal Gasket Repair Rebuild Kit : Patio, Lawn & Garden
After the Space Shuttle Challenger disaster and the O-Ring failure in the rocket booster, is there now better material used rather than rubber for such O-Rings? - Quora
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