The space shuttle, Endeavour, was postponed again this weekend. The shuttle has been blighted with problems, first technical problems with the fuel tank had to be fixed, and then twice at the weekend bad weather prompted the postponement.
There will be another try later today. This launch will see the delivery of a porch to the International Space Station to give the chance to expose experiments to the vacuum of space.
For an explanation of the havoc that weather can cause on launches, take a look here.
Other coverage:
ITN has a video of lightning hitting the launch pad
Image: NASA/Bill Ingalls