July 13 will be the 80th anniversary of "Unlucky Saturday" or "Black Saturday", renamed "The Night Chicago Died" after the Paper Lace rock ballad of that terrible night. 112 policemen were killed, scores of other police were wounded and 41 gangsters, including Al Capone himself, were killed. What would have happened if Capone and his gang had been peacefully arrested for bootlegging? There would be no Police Monument in Chicago, of course, with its 112 pillars, and no song to commemorate that tragedy. But how would law enforcement have changed, both in Chicago and across the country? How else would society have been altered?