CHICAGO – There are two dates in modern American History that ring in the heads of certain generations. Of course, there is September 11th, 2001, but the granddaddy of that date is November 22nd, 1963. That is when an American president, John F. Kennedy, was shot point blank in the head and killed on the street of an American city. The official proclamation from the government is that a lone assassin, Lee Harvey Oswald, fired those shots. In a new Chicago play, “Assassination Theater,” subtitled “Chicago’s Role in the Crime of the Century,” the jury is still decidedly out.