Slingshot team
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Rory meets Facebook's Slingshot app team

Facebook recently launched Slingshot - a photo-sharing app that requires the recipient to send back an image of their own before they can view the original picture.

The BBC's technology correspondent Rory Cellan-Jones visited the firm's headquarters in Menlo Park, California, where he met the team behind the new service.

He filmed the video above using Google Glass eyewear.

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