Astronauts carry out spacewalk to prepare ISS for upgrade

Two astronauts at the International Space Station (ISS) have been working on upgrading the ISS.

Barry Wilmore and Terry Virts performed the second of three spacewalks in which they are preparing the station for the arrival of commercial space capsules in the coming years.

Barry Wilmore was also heard saying, when looking at the view around him, "I don't think I've seen blue that blue".