Two astronauts stepped out into the void of space this morning to repair a critical piece of hardware on the International Space Station during a quickly-planned "contingency" spacewalk.
NASA's Peggy Whitson and Jack Fischer are, at the time of this writing, floating around outside the Space Station to replace a faulty electronics box known as a Multiplexer-Demultiplexer (MDM) that failed on Saturday. As Whitson repairs the MDM, Fischer will work to install some antennas on the outside of the station, a leftover task from the last spacewalk on May 12.
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