Aborted lift-off for SpaceX Falcon rocket and Dragon ship
19 May 2012 Last updated at 10:46 BST
The US firm SpaceX has aborted the lift-off of its Falcon rocket and Dragon ship to the International Space Station (ISS).
The rocket's engines were shut down just as it was about to leave the pad at the Cape Canaveral Air Force Station in Florida.
Onboard computers noticed the chamber pressure in one of the nine Merlin engines under Falcon was outside its permitted value.
Tuesday is the next launch opportunity.
Pictures courtesy of NASA