U.S. Senator Marco Rubio speaking with attendees at the 2015 Iowa Growth & Opportunity Party at the Varied Industries Building at the Iowa State Fairgrounds in Des Moines, Iowa.

Friday’s briefing begins with GOP presidential hopeful Marco Rubio telling a New Hampshire crowd China is “practicing how to blow up our satellites.”

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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...