The last flight of the space shuttle Endeavour has been pushed back 10 days.
NASA announced Monday that it has rescheduled the launch for 3:47 p.m. ET on April 29.
The 14-day mission, officially known as STS-134, had been scheduled to blast off on April 19.
However, that would have resulted in a scheduling conflict with the unmanned Russian Progress supply vehicle scheduled to launch April 27 and arrive at the International Space Station April 29 — while the space shuttle would have still been at the station, NASA said.
The new launch date, set following a meeting of International Space Station partners on Sunday, eliminates that conflict.
NASA spokesman Kyle Herring said typically the space agency does not allow unmanned cargo vehicles to dock while a space shuttle is at the station because the docking process, including the firing of the cargo ship's thrusters near the station, poses some risk to the shuttle.