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On this link -- bottom -- you can follow the Live transmission of the space walk, not a cake walk, and if you are lucky you see a glimpse maybe of the "others" presence:
Astronauts tackle shuttle repairs
Robinson expects to be able to pluck the fibres out with his fingers
"Two astronauts on the US space shuttle Discovery are carrying out a unique spacewalk to make heatshield repairs.
Armed with forceps and a saw, Stephen Robinson will go beneath the orbiter's underside to remove two ceramic strips sticking out between heatshield tiles.
Nasa engineers are concerned the strips may cause part of Discovery to overheat as it re-enters the Earth's atmosphere.
The crew has said it had some initial concerns about the job but they are confident they can repair the shuttle.
'Simple task'
The US space agency has identified two gap fillers that are sticking out between heatshield tiles near Discovery's nose section, each by less than 3cm (1.2in)."