To this day, only one person truly knows what happened on a lonely Massachusetts bridge on the night of July 18, 1969. Sometime that evening, a car driven by US senator Ted Kennedy plunged into the icy water below. While the politician survived, his passenger, a 28-year-old aide, was not so lucky. Mary Jo Kopechne died on the road from Chappaquiddick that Friday night. In the ensuing scandal, the presidential hopes of the last of the Kennedy brothers were destroyed. Now the senator has signed a £4million deal to write his memoirs, due out in 2010, raising hopes he is...