Veteran CBS News reporter and commentator Greenfield speculates what would have happened if an actual failed attempt to assassinate JFK before his inauguration instead succeeded; Robert Kennedy isn't assassinated, beats Nixon in 1968, winds down the Vietnam War, and with no Watergate scandal, the cultural changes of the 1970s are averted; and, Ford wins re-election, but in 1980 it's Hart vs. Reagan, and Hart wins.Abstract: Veteran CBS News reporter and commentator Greenfield speculates what would have happened if an actual failed attempt to assassinate JFK before his inauguration instead succeeded; Robert Kennedy isn't assassinated, beats Nixon in 1968, winds down the Vietnam War, and with no Watergate scandal, the cultural changes of the 1970s are averted; and, Ford wins re-election, but in 1980 it's Hart vs. Reagan, and Hart wins