In a surprise decision made in May, NASA abruptly replaced its associate administrator in charge of human spaceflight eight days before flying astronauts with a commercial partner for the first time in history. While NASA didn’t cite a specific reason for Doug Loverro’s resignation, the outgoing human spaceflight lead suggested a single mistake was made:

The risks we take, whether technical, political, or persona, all have potential consequences if we judge them incorrectly. I took such a risk earlier in the year because I judged it necessary to fulfill our mission. Now, over the balance of time, it is clear that I made a mistake in that choice for which I alone must bear consequences. 

Now the Wall Street Journal reports that federal prosecutors are investigating the incident:

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