Vincent Bugliosi put forward the hypothesis that Oswald aimed the Carcano with the open sights, which reduced the time necessary to take the three shots postulated by the Warren Commission. He notes that, with the downward slope on Dealey Plaza, President Kennedy's head would have appeared to Oswald to be a stationary target as the vehicle moved down and away at a slow speed. This suggestion also therefore makes any claim that the scope was defective to be meaningless with respect to Oswald's shooting ability.