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ISS spacewalk to install debris shields

20 August 2012 Last updated at 18:27 BST

Outside the International Space Station, two Russian cosmonauts are carrying out a spacewalk during which they will install shields to protect the structure from space debris.

Gennady Padalka and Yuri Malenchenko will also move a small crane and deploy a small satellite during the six-and-a-half-hour excursion, the first spacewalk from the ISS in more than six months.