Robert Lightfoot, NASA's Acting Administrator, to Retire as Trump's Nominee Is Stalled

Robert Lightfoot, NASA's Acting Administrator, to Retire as Trump's Nominee Is Stalled  New York Times Robert Lightfoot, NASA's longest-serving interim administrator, to retire  Spaceflight Now NASA's acting administrator to retire without a clear successor  Chicago Tribune NASA Acting Administrator Robert Lightfoot to Retire  Popular Mechanics Who's Running NASA?  The AtlanticFull coverage

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