Donald Trump calls the International Space Station from the Oval Office, offering congratulations to Expedition 51 commander Peggy Whitson on breaking the U.S. astronaut endurance record.
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Mission Reports
U.S.-Russian-German crew launched to space station

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.