sentences:  In 1991 Vronsky investigated Lee Harvey Oswald's activities in the USSR in 1959–1962 and was the first Westerner ever to interview Oswald's friends, lovers and acquaintances in Russia.Vronsky was the cameraman-line producer on "The Hunt for Red Mercury", an investigative one-hour documentary (Discovery Channel – CTV) on nuclear weapons material smuggling in Chechnya, 1992.He was the writer-director of "The Uncanadians", a NFB feature documentary 1994–1995 but withdrew his name from the director's credit in a dispute with the National Film Board over the film's controversial contents.)