The crew of space shuttle endeavor stepped out of the air lock for a six and a half hour space walk.
The main objective for today's mission is to retrieve samples from a science experiment designed to test the reaction of different materials to space.
Two Astronauts step away from the shuttle while it floated over the Philippines.
NASA says they will be retrieving three experiments outside the station, installing a new one and doing some maintenance work.
Endeavour's Astronauts will spacewalk four more times.
This is the final mission for Endeavour.