A closed book with a graphic of radiation waves superimposed on it
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The tech that could lead to reading a closed book

BBC Click's Nick Kwek looks at some of the best of the week's technology news, including the news that FBI director James Comey advised people to cover their webcams, something he does, to prevent hackers from spying.

Plus, the radiation technology which allows researchers to read through stacked pages.

More at BBC.com/Click and @BBCClick.

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