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“That's right. And four days later, there was another…” — Up First from NPR at 20:50

Up First from NPR Challenger at 40: Lessons from a tragedy

“That's right. And four days later, there was another hearing. Again, this one was also behind closed doors. This time the commission finally heard formal testimony from two of the Thiacal engineers, Alan McDonald who we just heard from and Roger Bojole.”

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