In November - by which time the rumors had been circulating for months - word came down from NASA headquarters that the directors of the Johnson Space Center in Houston and the Glenn Research Center in Cleveland would retire at the end of the year and be replaced by their deputies. Longtime NASA hand James Free took over at Glenn in January. Free, who joined NASA in 1990, has spent most of his career working on space systems. Then, in 2010, he became deputy director at Glenn, one of three NASA field centers specializing in aeronautics research.
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