Who was killed on 4 January 1967 when his jet propelled boat, Bluebird K7, somersaulted and disintegrated on Coniston Water?
Donald Campbell It happened at a speed in excess of 300 mph (480 km/h)
At which university on 4 May 1970 were 4 students killed and 9 wounded when an Army National Guard unit fired at students during a protest against the US invasion of Cambodia during the Vietnam War?