The finishing touches are being done to London's Olympic venues as the Games get underway.Although
football and archery kick off before Friday night's Opening Ceremony,
most sports don't start until the weekend.

And Olympics workers have been ensuring that all the venues are up to scratch ahead of the events taking place.
And Olympics workers have been ensuring that all the venues are up to scratch ahead of the events taking place.
Pretty in pink: Gymnasts at a practice session at the North Greenwich Arena ahead of the start of the Olympics
Hair-raising: Great Britain's Louis Smith - sporting a new haircut - tests out the horizontal bar at the North Greenwich Arena
Keep up, lads: This dazzling photograph was take of Smith as he went through his moves on the pommel horse
Amid sweltering heat in the capital -
with temperatures touching 31 degrees in places - the army of helpers
have been busy ensuring everything is ready.
It means London will..