Astronauts move solar tower during 2nd spacewalk

Two spacewalking astronauts unhooked a 15-ton girder from the international space station yesterday, starting the delicate process of moving the giant solar power tower to another part of the orbiting outpost.

Spacewalkers Scott Parazynski and Daniel Tani started their six-and-a-half-hour jaunt by disconnecting cables and unscrewing bolts that connected the girder to the space station's backbone.

They then guided astronauts Stephanie Wilson and Doug Wheelock as they used the station's robotic arm to detach the huge truss.