Live coverage of the Expedition 57 mission on the International Space Station. Text updates will appear automatically below; there is no need to reload the page. Follow us on Twitter.
Mission Reports
Spacewalkers prep space station for future upgrades
Space station commander Chris Cassidy and Robert Behnken floated back outside Tuesday for their fourth spacewalk in less than a month, completing preparations for future upgrades including the eventual installation of an airlock that will allow commercial experiments to be moved into and out of vacuum as required.
