US and New Zealand secretly tested 'tsunami bombs' designed to trigger tidal waves and destroy coastal cities

The U.S. and New Zealand collaborated on a top-secret plan to develop a 'tsunami bomb' capable of devastating coastal cities, it has emerged.

The countries carried out covert tests of the potential weapon of mass destruction - designed to use underwater explosions to trigger huge tidal waves - in waters around Auckland and the Pacific island of New Caledonia during the Second World War.

Details of the secretive operation, code-named Project Seal, were discovered in military files buried in New Zealand's national archives by author and film-maker Ray Waru.

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