Stone wanted to recreate the Kennedy assassination in Dealey Plaza. His producers had to pay the Dallas City Council a substantial amount of money to hire police to reroute traffic and close streets for three weeks. He only had ten days to shoot all of the footage he needed and so he used seven cameras (two 35 mm and five 16 mm) and 14 film stocks. Getting permission to shoot in the Texas School Book Depository was more difficult. They had to pay $50,000 to put someone in the window from which Oswald was supposed to have shot Kennedy. They were allowed to film in that location only between certain hours with only five people on the floor at one time: the camera crew, an actor and Stone. Co-producer Clayton Townsend has said that the hardest part was getting the permission to restore the building to the way it looked back in 1963. It took five months of negotiation.