Russian cosmonauts wrapped up a spacewalk today outside the International Space Station without moving a cargo boom that was intended to be their primary task.
Sergei Volkov and Alexander Samokutyaev installed a laser communications system outside the Zvezda module, deployed a small satellite after a delay due to an antenna problem, installed an experiment and removed an unneeded docking antenna.
But they ran too short on time to move a cargo boom from the Pirs airlock to the Poisk airlock, a job that was to have taken up about half the six-hour spacewalk.
The cosmonauts returned inside the Pirs airlock and closed the hatch at 5:13 p.m. to end the six-hour, 23-minute excursion.
It was the third spacewalk for Volkov and first for Samokutyaev, and the 29th by Russians in support of station maintenance and assembly.