In 1966, Cassius Clay ( later Muhammad Ali) beat Britain's Henry Cooper for the world heavyweight boxing title.

In 1979, Elton John became the first western rock star to play in the USSR at a concert in Leningrad.

In 1991, former Indian prime minister Rajiv Ghandi was killed when a suicide bomber blew herself up at an election rally in India.

From the Telegraph & Argus of May 21st, 1978...

Hundreds of people turned out for two major events in Bradford. Crowds of cheering youngsters greeted disc jockey Jimmy Savile as he arrived to start the T & A sponsored walk. Meanwhile crowds were outside City Hall for Bradford Northern's civic reception following their Premiership Trophy triumph at Swinton on Saturday.

From the Telegraph & Argus of May 21st, 1953...

The first British tubeless tyre was announced today by the Dunlop Rubber Co. Instead of an inner tube the tyre has a rubber lining and the pressure of the beading against the rim of the wheel is claimed to give a seal which is proof against any escape of air.