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The crew of space shuttle Discovery completed the second space walk.

Rick Mastracchio and Clayton Anderson replaced the tank with ammonia, which is part of the cooling system of the International Space Station. Exit lasted 7.5 hours — about an hour longer than originally planned. Astronauts detained tight bolt, which they had to screw to secure the new tank is filled with ammonia.

The old tank Mastracchio and Anderson will join the station. On the third spacewalk crew of the shuttle has to put it in the cargo compartment of the shuttle. To move the tank will work hand-arm ISS.

Shuttle Discovery was launched to the ISS on April 5. It was assumed that his mission will last 13 days, but later increased it by one day. The reason for the rescheduling was the breakdown antenna centimeter. The crew of space shuttle uses it to inspect the shuttle and the search for damage. Now astronauts will use the antenna ISS, and all procedures will take longer than using the shuttle’s own antennas.

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