Typhoons arrive for Olympic Exercise At RAF Northolt

Four Royal Air Force Typhoon jets, which will be used to defend the skies over the Olympic Games, are station outside their temporary hangars at RAF Northolt airbase on May 2, 2012 in London, England. The Typhoon jets will take part in operation Exercise Olympic Guardian, an eight-day training exercise over London and the Home Counties to help ensure an incident-free Games. (Getty Images)