Elon Musk pushed Federal Aviation Administration Chief Michael Whitaker from his post just 10 days before the deadly plane and Black Hawk helicopter crash over Washington, DC.
The Friday letter came two days after a midair collision between a Black Hawk helicopter and a commercial airliner near the national’s capitol killed 67.
The former FAA head tussled with Musk and wanted to fine SpaceX for safety violations. He resigned after Trump won the election and hasn't been replaced.
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