Athletes arrive in London

Competitors and officials descend on Britain ahead of the London 2012 Olympic Games.

LONDON, ENGLAND - JULY 16: Members of the Cuban Olympic team arrive at Heathrow Airport on July 16, 2012 in London, England. Athletes, coaches and Olympic officials are beginning to arrive in London ahead of the Olympics.

LONDON, ENGLAND - JULY 16: Baggage belonging to the Cuban Olympic weightlifting team is transported through Heathrow Airport on July 16, 2012 in London, England. Athletes, coaches and Olympic officials are beginning to arrive in London ahead of the Olympics. (Photo by Peter Macdiarmid/Getty Images)

Members of the Cuban weightlifting squad arrive at Heathrow airport in London

Members of the Cuban weightlifting squad arrive at Heathrow airport, London, July 16, 2012. The London 2012 Olympic Games start in 11 days time. REUTERS/Paul Hackett (BRITAIN - Tags: SPORT OLYMPICS)

LONDON, ENGLAND - JULY 16: Armed poilice patrol Terminal 4 as Olympic athletes arrive at Heathrow Airport on July 16, 2012 in London, England. Athletes, coaches and Olympic officials are beginning to arrive in London ahead of the Olympics. (Photo by Peter Macdiarmid/Getty Images)

LONDON, ENGLAND - JULY 16: Olympic volunteers wait to greet arriving teams at Heathrow Airport on July 16, 2012 in London, England. Athletes, coaches and Olympic officials are beginning to arrive in London ahead of the Olympics.

LONDON, ENGLAND - JULY 16: Olympic volunteers wait to greet arriving teams at Heathrow Airport on July 16, 2012 in London, England. Athletes, coaches and Olympic officials are beginning to arrive in London ahead of the Olympics.

LONDON, ENGLAND - JULY 16: A Russian Olympic team official is given assistance at Heathrow Airport on July 16, 2012 in London, England. Athletes, coaches and Olympic officials are beginning to arrive in London ahead of the Olympics. (Photo by Peter Macdiarmid/Getty Images)

Tatiana Bazyuk and Svetlana Shnitko part of the Russian Olympic sailing squad smile as they wait to board a bus at Heathrow airport, London

Tatiana Bazyuk (L) and Svetlana Shnitko part of the Russian Olympic sailing squad smile as they wait to board a bus after arriving at Heathrow airport, London, July 16, 2012. The Lndon 2012 Olympic Games start in 11 days time. REUTERS/Paul Hackett (BRITAIN - Tags: SPORT OLYMPICS)

Tatiana Bazyuk and Svetlana Shnitko and another member of the Russian Olympic sailing squad (L) arrive at Heathrow airport, London

Tatiana Bazyuk (R) and Svetlana Shnitko (C) and of the Russian Olympic sailing squad arrive at Heathrow airport, London, July 16, 2012. The London 2012 Olympic Games start in 11 days time. REUTERS/Paul Hackett (BRITAIN - Tags: SPORT OLYMPICS)

Olympic Rings are revealed during an unveiling ceremony in the Terminal Five arrivals hall at Heathrow Airport, in preparation for the London 2012 Olympic Games in London

Olympic Rings are revealed during an unveiling ceremony in the Terminal Five arrivals hall at Heathrow Airport, in preparation for the London 2012 Olympic Games in London June 20, 2012. REUTERS/Luke MacGregor (BRITAIN - Tags: TRANSPORT SOCIETY SPORT OLYMPICS)

Poster of Great Britain's cyclist Hoy is reflected in a mirror during a fitting out session at the Team GB Preparation Camp in Loughborough

A poster of Great Britain's cyclist Chris Hoy is reflected in a mirror during a fitting out session at the Team GB Preparation Camp in Loughborough, central England, July 16, 2012. REUTERS/Darren Staples (BRITAIN - Tags: SPORT OLYMPICS)

Pedestrians walk past Olympic Stadium in Stratford, east London

Pedestrians walk past the Olympic Stadium at the Olympic Park in Stratford, the location of the London 2012 Olympic Games, in east London July 16, 2012. REUTERS/Suzanne Plunkett (BRITAIN - Tags: SPORT OLYMPICS ENVIRONMENT)

Electrified security fence surrounds Olympic Village at Olympic Park in Stratford, east London

An electrified security fence surrounds the Olympic Village at the Olympic Park in Stratford, the location of the London 2012 Olympic Games, in east London July 16, 2012. The first wave of Olympic athletes and visitors began pouring into Britain on Monday and officials played down fears that a packed London would buckle under the pressure of its biggest peacetime security and transport operation. An embarrassing shortage of security guards, fears over airport queues and questions about the capital's creaking transport system have overshadowed preparations for the Games. REUTERS/Suzanne Plunkett (BRITAIN - Tags: SPORT OLYMPICS MILITARY)

A member of the RAF checks the identifications of two G4S security guards at an exit to the Olympic Park in Stratford, the location of the London 2012 Olympic Games, in east London July 15, 2012. The head of private security firm G4S said on Saturday his firm only realised just over a week ago it would not be able to supply enough venue guards for this month's London Olympics, as he publicly apologised for the embarrassing failure. On Thursday, the government said it would deploy additional troops after it became clear G4S was unlikely to provide the expected 10,400 guards it was contracted to do because of problems processing applicants. REUTERS/Andrew Winning

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