Douglas Loverro, head of human spaceflight at NASA, abruptly resigned on Monday, seven months into the position and only a week before the agency plans to send astronauts to space from United States soil for the first time in almost a decade.
In a farewell email to NASA employees, Loverro declined to explicitly explain why he was resigning, but cited an unspecified “mistake” he took in the course of the planned mission, according to NPR.
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