Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

LONDON, ENGLAND - JULY 17: Members of the armed forces patrol the Olympic Park on July 17, 2012 in London, England. (Photo by Michael Regan/Getty Images)

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Soldiers And Games Staff Prepare For The London Olympics

<> on July 17, 2012 in London, England.

Soldiers And Games Staff Prepare For The London Olympics

<> on July 17, 2012 in London, England.

Soldiers And Games Staff Prepare For The London Olympics

<> on July 18, 2012 in London, England.

London 2012 - Olympic Features

<> on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

LONDON, ENGLAND - JULY 17: A general view of the Olympic Stadium at Olympic Park on July 17, 2012 in London, England. (Photo by Michael Regan/Getty Images)

Previews Ahead Of London 2012 Olympic Games

LONDON, ENGLAND - JULY 17: A security guard stands out side the Olympic Stadium at Olympic Park on July 18, 2012 in London, England. (Photo by Michael Regan/Getty Images)

Previews Ahead Of London 2012 Olympic Games

at Olympic Park on July 18, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

at Olympic Park on July 18, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

at Olympic Park on July 18, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

at Olympic Park on July 18, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

at Olympic Park on July 18, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

at Olympic Park on July 18, 2012 in London, England.

Concerns Over Olympic Security Grows As G4s Dispute Continues

on July 17, 2012 in London, England. Private security company G4S has faced public criticism after failing to provide enough guards for London 2012 Olympic Games.

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

LONDON, ENGLAND - JULY 17: Workers sweep the paths outside the Olympic Stadium at Olympic Park on July 17, 2012 in London, England. (Photo by Michael Regan/Getty Images)

Official Wenlock and Mandeville Sculptures Are Installed Around London

LONDON, ENGLAND - JULY 17: People sit next to a model of Wenlock, one of the official 2012 Olympic mascots on July 17, 2012 in London, England. The scultptures make up part of a new 'discovery' trail that includes 83 of the official Wenlock and Mandeville sculptures while making it's way past some of London's famous landmarks. (Photo by Dan Kitwood/Getty Images)

Official Wenlock and Mandeville Sculptures Are Installed Around London

LONDON, ENGLAND - JULY 17: People sit next to a model of Wenlock, one of the official 2012 Olympic mascots on July 17, 2012 in London, England. The scultptures make up part of a new 'discovery' trail that includes 83 of the official Wenlock and Mandeville sculptures while making it's way past some of London's famous landmarks. (Photo by Dan Kitwood/Getty Images)

Olympic Game Lanes Begin To Come Into Effect Around London

on July 17, 2012 in London, England. Competitors and officials have started to arrive ahead of the London 2012 Olympic Games.

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.

Previews Ahead Of London 2012 Olympic Games

during previews ahead of the London 2012 Olympic Games at Olympic Park on July 17, 2012 in London, England.