London Olympic Security

In this file photo security forces take part during in a combined British police and British Royal Marines security exercise for the London 2012 Olympic Games on the River Thames in London. Fighter jets thunder above the English countryside. Missiles stand ready.(AP Photo/Alastair Grant, File)

This photo released by Britain's Ministry of Defence shows Royal Air Force Puma helicopter is pictured flying over the 2012 Olympic Stadium during a training flight over London. Fighter jets thunder above the English countryside. Missiles stand ready.(AP Photo/SAC Phil Major RAF, MOD)

In this photo members of the British military's Royal Artillery regiment stand near a Rapier air defence system during a media event ahead of a training exercise designed to test military procedures prior to the Olympic period in Blackheath, London. The British military plans to deploy surface to air missiles at six sites around London.(AP Photo/Matt Dunham, File)

A general view shows the Fred Wigg Tower in Leytonstone, east London, Tuesday, July 10, 2012. A judgement is due to be handed down Tuesday after residents of the London apartment tower went to court Monday in a bid to stop their rooftop from being used as a missile base during the upcoming Olympic Games, saying the deployment in a densely populated area could make the building a terrorist target. (AP Photo/Matt Dunham)

In this photo, Sergeant Craig from Britain's Royal Artillery regiment holds a high velocity missile, or HVM, lightweight multiple launcher during a media event ahead of a training exercise designed to test military procedures prior to the Olympic period in Blackheath, London.(AP Photo/Matt Dunham, File)

A cameraman films a high velocity missile, or HVM, lightweight multiple launcher during a media event ahead of a training exercise designed to test military procedures prior to the Olympic period in Blackheath, London. The British army will be putting HVM missiles, capable of shooting down a hijacked aircraft, on the roof of Fred Wigg Tower, an apartment building on the outskirts of London, as part of its security during the 2012 Olympics.(AP Photo/Matt Dunham, File)

A high speed 12 seater rigid inflatable boat, run by the Protection Services International company, travels past London's Canary Wharf financial district. Companies like Protection Services International are just one of the many catering to the super rich who are coming to the London games and demand top security and easy transport.

People are seen aboard a high speed 12 seater rigid inflatable boat, run by the Protection Services International company as it travels past the Palace of Westminster on London's river Thames. Companies like Protection Services International are just one of the many catering to the super rich who are coming to the London games and demand top security and easy transport.

An aerial view of a British military missile battery placed on top of the Fred Wigg building in east London part of the defenses for the London 2012 Olympic summer games Friday, July, 13, 2012. (AP Photo/Alastair Grant)

An aerial view of the Fred Wigg building in east London where the British military are installing a missile battery on top of it as part of the defenses for the London 2012 Olympic summer games Friday, July, 13, 2012. (AP Photo/Alastair Grant)

An aerial view of a British military missile position on top of the Lexington Building in east London, part of the defenses for the London 2012 Olympic summer games Friday, July 13, 2012. (AP Photo/Alastair Grant)

An aerial view of a British military missile battery on Blackheath common in south London, which is part of the defences for the London 2012 Olympic summer games Friday, July, 13, 2012. (AP Photo/Alastair Grant)

An aerial view of a British military missile battery next to a reservoir on the Lea Valley in east London, part of the defenses for the London 2012 Olympic summer games Friday, July 13, 2012. (AP Photo/Alastair Grant)

An aerial view of a British military missile battery next to a reservoir on the Lea Valley in east London, part of the defenses for the London 2012 Olympic summer games Friday, July 13, 2012. (AP Photo/Alastair Grant)

A sniper with the Royal Air Force Regiment, looks through the scope of his sniper rifle as the military prepares for duty to provide security aboard helicopters high above the London Olympic games, at RAF Northolt, in London, Friday July 13, 2012. (AP Photo)

A sniper with Royal Air Force Regiment Sniper, sights through his scope from inside an RAF Puma helicopter at RAF Northolt ahead of carrying out air security duties for Op Olympic, in London, Friday July 13, 2012. (AP Photo)

Metropolitan specialist dog 'Spike' searches Victoria Coach Station in London in the run up to London 2012 Olympic Games, Thursday, July 12, 2012. (AP Photo/Sang Tan, Pool)

Metropolitan specialist dog 'Chester' searches Victoria Coach Station in London in the run up to London 2012 Olympic Games, Thursday, July 12, 2012. (AP Photo/Sang Tan, Pool)

Metropolitan specialist dog 'Spike' searches Victoria Coach Station in London in the run up to London 2012 Olympic Games, Thursday, July 12, 2012. (AP Photo/Sang Tan, Pool)

Metropolitan specialist dog 'Chester' searches Victoria Coach Station in London in the run up to London 2012 Olympic Games, Thursday, July 12, 2012. (AP Photo/Sang Tan, Pool)