Space Shuttle Endeavour's final liftoff postponed until April 29th.
NASA has delayed the launch of Space Shuttle Endeavour due to a scheduling conflict with a Russian spacecraft.
The launch has been delayed until April 29th.
The conflict involves a Russian resupply craft called the "Progress" which is scheduled to launch a few days after Endeavour.
The Russian spacecraft cannot dock with the International Space Station while Endeavour is there.