Twitter Tracker: The Buzz at Space Symposium

You can't get much more authentically space-centered than the second man on the moon. Astronaut Buzz Aldrin made an appearance on the final day of the National Space Symposium, and told the Twitterverse about it.

Much of the conversation at the event centered on the prospects of combat in space.

Attendees enjoyed the panels.

Who was first?

They hate to say goodbye.

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