When conspirator SS Greer STOPPED (red line) the limo during the turn, the cars following behind bunched up behind into the intersection---all caught in the Altgens photo and deliberately removed from the Zapruder film between frames 132 and 133, the blue line indicates the angle of Altgen’s aim looking into the Dal-Tex building
Notice a Secret Service agent could have ridden on the back of the JFK limo during the entire motorcade, but he would then have had no excuse for not throwing his body in front of bullets to shield JFK, and we wouldn’t have had JFK removed from office by murder. Again, why the SecretService is directly involved with JFK’s murder.