In all of its history, only the 1960’s surpassed the 1860's as America’s bloodiest decade. — Friday, November 22, 1963, for those of us of a certain age, is the date seared into our childhood memories like no other. For weeks, President John Kennedy’s murder, live and (for those who could afford it) in color, was endlessly played out on our Zenith, Philco, and Motorola “combination”…