Robots taking over surgery

Robots taking over surgery

Robots taking over surgery

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Robots taking over surgery

Robots taking over surgery
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Katy Perry at the DNC: "Here's how I'm going to use my voice. I'm going to vote for Hillary Clinton."

Katy Perry at the DNC: "Here's how I'm going to use my voice. I'm going to vote for Hillary Clinton." Up next

Katy Perry at the DNC: "Here's how I'm going to use my voice. I'm going to vote for Hillary Clinton."