John Glenn
John Glenn in February 2012, at events marking the 50th anniversary of his historic Mercury flight.

John Glenn, the first American to orbit the Earth who, decades later, got to fly into space again on the shuttle as a senator, passed away Dec. 8 at the age of 95.

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Jeff Foust has more than a decade of experience writing about space policy, entrepreneurial ventures and regulatory affairs. In 2001, he established spacetoday.net to aggregate and summarize the day's space-related news stories. In 2003, he started The...