NASA astronauts Sunita "Suni" Williams and Barry "Butch" Wilmore have been on the International Space Station since June, even though they initially expected to stay for just eight days. They'll be back on Earth in late March.

NASA astronaut Sunita Williams and Butch Wilmore on Thursday stepped out of the International Space Station (ISS) for 5.5-hour spacewalk, setting a new record, the US space agency said.

NASA astronaut Sunita Williams made history on Thursday, by surpassing the record for the most time spent in the vacuum of space by a woman. During a 5-hour and 26-minute spacewalk outside the International Space Station,