SPACE STATION ALPHA (AP) -- Just when the international space station crew thought it was about to have company, it has been told of shuttle Atlantis' latest problem.
Mission Control told the trio today's planned launch was scrapped because of an electrical system problem.
Astronaut Jeff Williams said it "doesn't sound promising." Mission Control replied that NASA wants to be "ever hopeful" that the problem can be fixed in time to launch tomorrow or Friday.
The Atlantis crew has been waiting more than four years to get into space. No construction has been done on the station since the Columbia disaster three and-a-half years ago.
The station crew is expected to get some visitors soon even if Atlantis doesn't launch. Russia's Soyuz is due to carry two new crew members there later this month, along with the station's first female tourist.