CNN CNN Newsroom December 24, 2013 14:02:00
Orbiting international space station. >> failure of an internal flow control valve. >> reporter: to american astronauts are venturing out. their mission? to replace a pump needed to cool the vessel. >> i don't know if you guys believe in miracles, but i got the hitch pin on the first try. >> that's awesome, rick. >> reporter: offer the weekend, astronauts rick mastacchio and mike hop kins, cooling fluid, ammonia. >> hooking up the big heavy ammonia lines are massive. if you were to leak ammonia, not a very pleasant chemical. you couldn't bring it inside. there's definite risk out there. >> rep...
Source: archive.org