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I cannot hand any of my digital devices over to a friend or a loved one or a colleague

without fear of them thinking that I am some kind of monster.

That's Joan Donovan. She's not a monster. She's the director of technology at the

Harvard Kennedy Shorenstein Center where she researches some monstrous behavior.

We spend a lot of time tracking white supremacist groups online because they are often

at the forefront of media manipulation issues, always trying to trick a journalist into covering an issue a certain way.

And where do you see these groups posing a threat?

Anywhere, there's Wi-Fi.

They'll hide in depression forums, they'll hide in gaming communities, they'll hide in issues related to immigration.

They'll hide in economic forums.

Joan isn't just a voyeur.

She's a meteorologist.

By watching extremist activity online... She's a meteorologist.

By watching extremist activity online,

she can see a storm before it hits.

Two years ago, Joan was monitoring chatter on a far right Facebook group.

...