Of all the words Rudy Giuliani used in his Florida concession speech last night, ' 9/11 ' was not one of them.  The omission of his signature leitmotif from his only major televised speech was not an oversight, but a harbinger of big change in American politics.  Finally, after 7 years of Republicans exploiting 9/11 to win elections and pass policies, Giuliani's failure in the ...