NASA astronauts all set for emergency spacewalk outside International Space Station today
Expedition 51 Commander Whitson and Flight Engineer Fischer will replace a critical computer relay box that failed May 20.
May 23, 2017, 09:32 AM ISTEmergency spacewalk: Here's why NASA astronauts will venture outside space station on Tuesday
The multiplexer-demultiplexer (MDM) data relay box on the S0 truss failed on Saturday morning.
May 22, 2017, 11:31 AM IST