Watch this 18 second film and ask yourself if Oswald could have made Kennedy's head go back and to the left. Oswald was supposedly firing from the Texas Book Depository which was to Kennedy's right rear. http://www.youtube.com/watch?v=ozx4_4DZp38 This film, known as the Zapruder Film, was suppressed for 12 years and the only reason we saw it was because Jim Garrison, the D.A. of New Orleans subpoenaed it for the 1969 trial of Clay Shaw and left it out to be copied. Life magazine, who owned the film but never allowed it to be shown other than to a few, fought the subpoena all the way to the U.S. Supreme Court but they had no grounds to deny it. Finally, Geraldo Rivera played a copy of it on network TV in March of 1975 and the furor over it is what caused the House Select Committee on Assassinations to be started up.