You can watch two astronauts take a spacewalk to fix a $2 billion space experiment today. Here's how.

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NASA plans to send a pair of astronauts on a spacewalk, one more time, to finish fixing a complicated science experiment today (Jan. 25). Here's how to watch it live.

You can watch two astronauts take a spacewalk to fix a $2 billion space experiment today. Here's how. : Read more