A new, chewable nanotechnology lets people take pictures with their eyes and cures cancer. But the early adopters find out it's hard to uninstall something after it's spread through their bloodstream.

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Line Of Sight is a rare view into underground bicycle messenger racing which has become a global phenomenon. For over a decade Lucas Brunelle has been riding with the fastest, most skilled urban cyclists around the world while capturing all the action with his customized helmet cameras to bring you along for the ride.