The USSR exploded a hydrogen bomb 

Worlds 1st air race held in Rheims France. Glenn Curtiss (USA) wins 

NY gives a ticker tape parade to returning US Olympians from London 

Bridge in St Lawrence Canada caves in; 70 die 

Pierre de Brazza leaves Brazzaville 

3rd modern Olympic Games opens in St Louis 

Michael Faraday successfully demonstrated the first electrical transformer at the Royal Institute, London, UK