Astronauts end 2nd spacewalk

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US astronauts have ended their second spacewalk, folding up old solar panels on the International Space Station, reports BBC.
The two shuttle Atlantis astronauts folded a solar wing to allow a new system of panels to rotate properly.
They should complete the work in the next walk on Thursday and a fourth walk on Friday will see if repairs are needed to the thermal re-entry blanket.
Damage to the shuttle Columbia in 2003 during its launch led to the vehicle's disintegration as it returned to Earth.
Engineers do not think the damaged section this time will endanger the re-entry.
They think the blanket was loosened by aerodynamic forces and was not hit by debris. The second spacewalk began at 1828 GMT on Wednesday, Nasa said.
Pat Forrester and Steve Swanson spent more than seven hours on the old and new solar arrays before fellow astronaut James Reilly told them.