© Licensed to London News Pictures. 04/05/2012. LONDON, UK. The Royal Navy's helicopter carrier, HMS Ocean makes her way through the the Thames Barrier in London today (04/05/12). HMS Ocean has been deployed as part of an exercise involving the RAF, British Army and Royal Navy taking place across London as part of security preparations for the 2012 London Olympic Games. Photo credit: Matt Cetti-Roberts/LNP
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