Two astronauts are currently on a six-and-a-half-hour spacewalk outside the International Space Station to replace a failed power regulator, and relocate a failed cooling pump.
The spacewalk, which http://www.nasa.gov/multimedia/nasatv/index.html%23.VDPtPytdVyshttp://www.nasa.gov/multimedia/nasatv/index.html%23.VDPtPytdVyshttp://www.nasa.gov/multimedia/nasatv/index.html%23.VDPtPytdVys">NASA is livestreaming, started around 8:10 a.m. ET. NASA flight engineers Reid Wiseman and Alexander...
