What if your face could serve as your passport and identification? Does that sound convenient, or incredibly creepy and invasive? As advances in technology spread from pilot programs to wider use at borders around the world, there's very little governing what agencies can and can't do with the data they capture. And there's almost no way for us to opt out—at least, if we want to ever visit the United States again.

How far can this technology go? What can it be used for? Are there any regulations in place to protect you? And just how much of our body's unique signature are we prepared to hand over, anyway? Where does this end?

GUEST: Hilary Beaumont, freelance investigative reporter

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