LOS ANGELES (AP) — Jason Clarke plunged into frigid waters, repeatedly, for his role as the late Sen. Ted Kennedy in "Chappaquiddick."The Australian actor said his research about the accident that thwarted Kennedy's presidential chances included jumping into Poucha Pond, the same waters the Massachusetts Democrat's car crashed into in July 1969, killing Mary Jo Kopechne. Clarke said the indie film, which is in limited release on Friday, doesn't try to sensationalize the accident, which Kennedy failed to report for nine hours. He said the film sticks "to the facts as much as we could and to play it out without scandalizing, without going to the tabloid of it.""This man committed this act and he worked his way out of it with help and with his own moral journey to the other side, where he then became one of the longest-serving senators in history.