America is greeting the New Year with a spasm of nostalgia for an old one. Tom Brokaw's new book, "Boom!", is a virtual reunion of the class of '68 (the high point is a photograph of the young Dick Cheney astride a motorbike and wearing shades). Newsweek has dubbed 1968 "the year that changed everything". On December 30th the Washington Post quoted David Maraniss, one of the best chroniclers of the 1960s, waxing lyrical about '68: "there was a mood that anything was possible, good or bad, that life was changing by the week...it was kind of dizzying and exhilarating and tragic."
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