Depressurization of the airlock is complete and today's spacewalk began at 12:19 p.m. EDT, with the switching of the spacesuits to battery power. The astronauts are preparing to leave the airlock to begin the 126th spacewalk to build the International Space Station.
Dave Wolf, on his fifth spacewalk, will wear red stripes on the legs of his spacesuit. Timothy Kopra's suit will have no markings for his first spacewalk. The astronauts will begin by working on separate tasks.
Watch the 6.5-hour spacewalk by clicking on the NASA-TV selector to the right.
The pair will work to prepare the Japanese Exposed Facility for attachment to the Kibo module and perform a series of technical maintenance tasks.
Other tasks include preparing for a Japanese cargo ship, working on an external equipment cart and fixing a jammed spare parts mount.
The JEF is scheduled to be installed at 5:38 p.m. EDT, after several handoffs between robot arms.
Space news and analysis from Kennedy Space Center and Cape Canaveral 
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