Here's the summary for the wikipedia article you mentioned in your comment:

Michael Douglas Griffin (born November 1, 1949) is an American physicist and aerospace engineer who served as the Under Secretary of Defense for Research and Engineering from 2018 to 2020. He previously served as Deputy of Technology for the Strategic Defense Initiative, and as Administrator of NASA from April 13, 2005, to January 20, 2009. As NASA Administrator Griffin oversaw such areas as private spaceflight, future human spaceflight to Mars, and the fate of the Hubble telescope. While he describes himself as a "simple aerospace engineer from a small town", Griffin has held several high-profile political appointments. In 2007 he was included in the TIME 100, the magazine's list of the 100 most influential people.

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