Hubble handrail poses a problem

Astronauts had to use brute force when their specially designed tools could not dislodge a stripped screw on the Hubble Space Telescope.

Mike Massimino had to rip a handrail off before he could start his real work of repairing a spectrograph, which was disabled by a power failure five years ago.

Nasa has said that early test results show the spacewalk was a success.