Jeff Ball, thinking he's talking to Chris of CH Delivery, talks about his girlfriend and business partner. He met 'Wendy' online, and talks about the 'To Catch a Predator' series and the dangers of meeting people over the Internet. Little does he know he's actually speaking with Dateline's Chris Hansen.

I have heard from thousands of you who have been victimized by the kinds of crimes we have investigated. It got me thinking about other stories we could do using our investigative techniques and hidden cameras...

A denial-of-service attack on Twitter highlights security risks that we've been warned about again and again — but never seem to take seriously enough.

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