London Olympics lights switched on for first time

for the first time at a ceremony in east London,London's 2012 Olympic floodlights have been turned on.

To press the start button British Prime Minister David Cameron and London Mayor Boris Johnson led a countdown for local schoolchildren.

The Stadium has 14 light towers that are 70m tall and support 532 individual lights,the stadium is due to be finish next year.

As they slowly lit up the snow-covered arena, London Mayor Boris Johnson said it was "a historic evening".