Discovery piggy-backs on 747 and makes Washington flypast

One of Nasa's iconic space shuttles has made a dramatic flypast over the centre of the US capital on the way to its final resting place in a museum.

After circling four times over the Washington Monument, and passing the National Mall over Capitol Hill, Discovery landed at Dulles Airport, a few miles outside Washington DC.

Robert Massey, from the Royal Astronomical Society, explained the significance of the Discovery shuttle.