British security sources revealed that the security envelope developed to protect the Summer Olympic Games in London will include six Rapier surface-to-air missile (SAM) batteries. The British security forces will conduct, between 2 and 10 May, a massive exercise, called Exercise Olympic Guardian, on land, sea, and in the air in the London and Weymouth areas. For those familiar with London: For the exercise, six sites were selected for deployment of the SAM dummies: the Lexington Building in Tower Hamlets; the Fred Wigg Tower in Waltham Forest, east London; Blackheath Common; Oxleas Wood, Eltham; William Girling Reservoir, Enfield; and Barn Hill in Epping Forest.