There was confusion amongst witnesses about whether the limousine stopped or slowed down .
Close witnesses recalled seeing the limousine stop , as reported in national broadcasts by CBS and ABC news.youtube.com % 2Fwatch % 3Fv % 3D7o4oeOJgNqQ & usg=AOvVaw1GdXZrBkQ7Qt69LnphyTmi The Warren Commission — based on the Zapruder film — found that the limousine had traveled an average speed of 11.2 miles per hour over the 186 ft of Elm Street immediately preceding the fatal head shot .
Assassination of John F. Kennedy