Endeavour astronauts Drew Feustel and Mike Fincke have completed a six-hour, 54-minute spacewalk today, the third one of the mission.

With this being the third of fourth spacewalks, Endeavour STS-134 astronauts have 21 hours 20 minutes outside the space ships. Overall, it was the 247th spacewalk conducted by U.S. astronauts, the 117th from space station airlocks, and the 158th in support of space station assembly and maintenance. It was Feustel's sixth and Fincke's eighth.

Fincke and Chamitoff will be conducting the final spacewalk on Friday. When he completes this spacewalk, he will pass Peggy Whitson as the U.S. astronaut who has spent the most days in space. She spent 377 days in space.

During the spacewalk, Feustel and Fincke installed cables to increase redundancy for the power system on the Russian segment of the station. They also completing the external wireless antenna system work Feustel and mission specialist Greg Chamitoff began on the first spacewalk.

Lastly, the duo installed a power and data grapple fixture to Zarya, the Russian module. This fixture will allow the Interantional Space Station's robotic arm to walk to the Russian segment, extending its reach by using that grapple fixture as a base.

During the 16-day mission, the final one for the space shuttle, Endeavour and its crew has delivered the Alpha Magnetic Spectrometer (AMS) and spare parts including two S-band communications antennas, a high-pressure gas tank and additional spare parts for Dextre to the ISS. The space shuttle is set to return next week on June 1.

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