Space Shuttle Atlantis

NASA says it's back on track for a lift-off of shuttle Atlantis.

After several weather delays, the space agency is hoping to get the orbiter on its way to the International Space Station on Wednesday. But the window for launch extends through Friday.

Test director Jeff Spaulding says the astronauts have been waiting "for years" to get their outer space construction mission under way. And they had to wait a little longer for Tropical Storm Ernesto to clear out.

But Spaulding says the countdown now is "tracking extremely well" with "no issues."

(Copyright 2006 by The Associated Press. All Rights Reserved.)