Allan McDonald, engineer who refused to approve Challenger launch, dies in Utah
Click here for updates on this story OGDEN, Utah (KSL) — Allan McDonald, the whistleblower and engineer sent by contractor Morton Thiokol to approve the 1986 Challenger space shuttle launch but who refused to sign off, has died in Ogden at age 83, according to NPR. McDonald was overruled by NASA and company management prior
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