It depends which country you are from, you do not need one for the games themselves but you may need one to enter the country.
Yes
Yes, American citizens do not need a visa to travel to London for short visits, typically up to 6 months.
You do not need a transit visa, if you do not go out of the airport to see London or change airports at London.
No - not if you are a European citizen. If you are American/Canadian you also do not need one if you have signed the Visa Waiver
To enter the United Kingdom, you will need a passport and, from many countries, a visa. Once you are in the United Kingdom, you can go to London freely: there are no internal checkpoints.
Yes.
If you need a visa to go to Senegal, you need to apply for it.
no you don't need a visa to go to Algeria
199 days left for 2012 london olympics.
Bejing olympics 2008 and is going to 2012 London Olympics
buying a ticket to london an d to the olympics! From: Luca Gianella
hello i want to help me about the viss to go in germany but i m refuger