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| Nasa cancels space shuttle launch | Nasa cancels space shuttle launch |
| (20 minutes later) | |
| The launch of space shuttle Endeavour has been cancelled due to a hydrogen leak, Nasa officials have announced. | The launch of space shuttle Endeavour has been cancelled due to a hydrogen leak, Nasa officials have announced. |
| Endeavour was due to take off from Cape Canaveral with seven astronauts at 0717 local time (1117 GMT), but was cancelled several hours beforehand. | |
| The problem was discovered during fuelling, before the astronauts had donned their spacesuits. | |
| The shuttle was to deliver equipment for space experiments, as well as drop off a new station crew member. | |
| Crew switch | |
| The ship would have taken three days to reach the International Space Station, where six astronauts work. | |
| It was to deliver the final components of Japan's Kibo laboratory. | |
| During five scheduled spacewalks, an external platform was to be added to the lab that would enable experiments to be performed that require materials to be exposed to the harsh environment of space. | |
| Endeavour astronauts also need to fit equipment to the exterior of the platform such as batteries and a spare space-to-ground antenna. | |
| Endeavour was to deliver a new crew member (Tim Kopra) to the ISS and bring back another (Koichi Wakata) who has lived aboard the platform for more than three months. | |
| When it does take off, Endeavour will be making the 127th space shuttle flight, and the 29th to the station. |