US astronauts completed the second of five spacewalks Sunday, beginning the relocation of a key supporting truss but also detecting a problem with one of the mechanisms supporting an key energy unit of the International Space Station.
Damage was discovered in a joint supporting the station's solar arrays, a problem that NASA engineers will now have to solve.
http://www.space-travel.com/reports/NASA_crew_completes_second_space_walk_discovers_damage_999.html
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