AP photographer James Altgens' famous photo of the motorcade right after Kennedy reacts to something hitting him in the throat.  Notice through the windshield of the limousine the First Lady's hand on JFK's left arm as the president clutches his throat.  Governor Connolly begins his turn to look back.  He has not been hit yet, refuting the Warren Commission's far-fetched Magic Bullet theory that JFK and Connolly were hit by the same bullet, one that first went through Kennedy's neck and exited in the area he is grasping at in this photo, continuing on to strike Connolly. Notice also the trajectory required for such a shot- it certainly doesn't point to the supposed sixth floor sniper's perch(Texas School Book Depository is in the left background.)