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.

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 made a 5.5-hour spacewalking record. They broke the record of former astronaut Peggy Whitson.