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.

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

London 2012 Olympics security: Special forces give a show of strength on the Thames

Hms ocean hi-res stock photography and images - Alamy

Security forces at London Olympics 2012

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

Friday 13th july 2012 hi-res stock photography and images - Alamy

Olympics security hi-res stock photography and images - Alamy

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

G4s security olympics hi-res stock photography and images - Alamy

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

Olympics security hi-res stock photography and images - Alamy