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. - CMBXX9 from Alamy's library of millions of high resolution stock photos, illustrations and vectors.

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

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

HMS Ocean, Olympic Security: The Machinery Guarding London 2012

Security forces at London Olympics 2012

Olympics security hi-res stock photography and images - Alamy

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

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

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

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

Olympics security 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')

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