Armed and ready...http://www.dailymail.co.ukSecurity: Soldiers in residential tower blocks and green open spaces were yesterday pictured installing surface-to-air missiles at a number of sites across the capital. This image shows Rapier missile systems on Blackheath Common
Show of strength: With two weeks to go before the start of the London 2012 Olympic Games, it marks a dramatic development as part of the security operation
Force: Soldiers are pictured preparing the missile site on the top of Lexington Building, Tower Hamlets. It is part of the biggest peacetime security operation the country has ever seen
Deadly: This picture shows troops testing anti-aircraft guns in Hyde Park, London in 1939. Many older generations of people no doubt thought they would never see such weaponry in the capital again.