How the metal detector became a million dollar idea

Name: How the metal detector became a million dollar idea
Uploaded: 2019-07-25T23:01:51.000Z
Duration: 1 min 22 s
Description: The BBC's Aaron Heslehurst explains how the metal detector became a million dollar idea.

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The metal detector is a vital tool for airport security guards and treasure hunters, alike. But when Alexander Graham Bell made the version ever to get a patent, he had only one aim in mind - to save the life of a US president. Aaron Heslehurst explains.

Video journalist: Jeremy Howell

Business

26 July 2019