Friday 13th July 2012 Operation Olympics, HMS Ocean takes her place on the River Thames in preparation for London 2012 Olympic Games security operation Stock Photo - Alamy

Download this stock image: Friday 13th July 2012 Operation Olympics, HMS Ocean takes her place on the River Thames in preparation for London 2012 Olympic Games security operation. - CMBXX8 from Alamy's library of millions of high resolution stock photos, illustrations and vectors.

Olympics security hi-res stock photography and images - Alamy

London 2012 Olympics: HMS Ocean moors on the Thames for security operation

London 2012 Olympics: HMS Ocean moors on the Thames for security operation

The biggest ship in London! HMS Ocean heads up the Thames in show of strength before the Olympics (as Defence Secretary warns: 'We would shoot down a jet if necessary')

Hms ocean hi-res stock photography and images - Alamy

Hms ocean hi-res stock photography and images - Alamy

The biggest ship in London! HMS Ocean heads up the Thames in show of strength before the Olympics (as Defence Secretary warns: 'We would shoot down a jet if necessary')

Hms ocean hi-res stock photography and images - Alamy

1,671 Security Olympic Games London 2012 Stock Photos, High-Res Pictures, and Images - Getty Images

Army security london olympics hi-res stock photography and images - Alamy