Since JFK, there's also been Luis Carrero Blanco (Prime Minister of Spain, who died from an ETA car bomb in 1973), Aldo Moro (Prime Minister of Italy, abducted and executed by the Red Brigades in 1978), Park Chung-hee (president of South Korea, shot by his security chief in 1979), Olof Palme (Prime Minister of Sweden, shot in the street in 1986), and Yitzhak Rabin (Prime Minister of Israel, shot by an extremist who disagreed with the Oslo peace process in 1995), and I probably missed some.