The political and social upheaval of the 1960s reached its turbulent peak in     1968--the year of the assassinations of Martin Luther King and Robert Kennedy,   the Tet Offensive in Vietnam, and the violence at the Democratic National        Convention in Chicago. This program looks at the lasting effects of that       chaotic year, with dramatic archival footage and interviews with key figures   from the period, including Jesse Jackson, Tom Hayden, Pat Buchanan, Walter     Cronkite, Carlos Fuentes and others. 56 mins.