American snipers and special agents traveling with Bush were to be given diplomatic immunity in the event that they should kill any of the expected 100,000 protesters. An artillery weapon called the "mini gun," normally used in battlefield conditions, was to be flown in in case it was deemed necessary to mow down protesters en masse. Vast sections of the city were to be closed to all traffic, forcing the closure of untold hundreds of businesses. Americans were to be placed in charge of all security operations, ahead of the British Scotland Yard, the MI5, the Metropolitan police, and Blair's own security detail. And U.S. fighter jets and Blackhawk attack helicopters, armed with surface-to-ground missiles and high-powered machine guns, were to secure the skies over London.