The event was livestreamed by NASA on YouTube and their website, marking Williams' ninth spacewalk and the 92nd spacewalk by a US astronaut.

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 astronauts Sunita Williams and Butch Wilmore completed a record-setting 5.5-hour spacewalk outside the ISS, adding to Williams' impressive achievements. The spacewalk included the removal of a radio frequency antenna and collecting surface material samples.