Obamas tour Kennedy Space Center
US President Obama and his family have taken a tour of Kennedy Space Center in Florida after the planned shuttle launch was postponed at the last moment.
Endeavour's lift-off was delayed because of problems with a unit that powers the vehicle's hydraulics.
Mr Obama, first lady Michelle Obama, and daughters Sasha and Malia were shown the Atlantis shuttle in the building where it is being processed for flight.
30 Apr 2011