VIDEO: Expedition 42-43 mission preview

Astronauts Terry Virts and space station commander Barry “Butch” Wilmore ventured back outside Sunday for their third spacewalk in eight days to complete initial preparations for upcoming dockings by commercially developed Boeing and SpaceX crew ferry ships.

A camera packed inside Europe’s Automated Transfer Vehicle failed to transmit images from inside the disposable supply ship as it plunged through Earth’s atmosphere Feb. 15 and broke apart over the South Pacific Ocean, the European Space Agency said Friday.

Inside the final assembly building at the Baikonur Cosmodrome, the Soyuz TMA-15 spacecraft is mated to the core of the Soyuz booster rocket for Sunday’s Expedition 42 launch to the International Space Station.