The scale of the security operation surrounding the London 2012 Olympic Games is massive.

This video posted on Youtube (UK enforces Olympic flight restrictions) gives some idea of the scale of the operation. The private security firm G4S informed the government that they could not meet the target of staff required for Olympic Security – see Home Secretary Theresa May explaining the G4S problem to the House of Commons and informing the House that troops are “ready to step in when their country calls.”