LOS ANGELES, May 29: American actor Rob Lowe will portray slain President John F. Kennedy in a television movie based on a book by TV news commentator Bill O’Reilly and author Martin Dugard, the National Geographic Channel said on Tuesday. “Killing Kennedy” will take the form of a “factual drama” and will premiere on National Geographic TV channel later this year to coincide with the 50th anniversary of Kennedy’s assassination, the network said. (agencies)