Dutch police confirm they've arrested a teenager who tweeted a threat at American Airlines.
A 14-year old girl tweeted the airline, pretending to be part of Al Qaida. She also promised to do something "really big" on June 1. The girl, known as Sarah, says it was just a joke, but American Airlines didn't think it was funny.
For a little perspective on this, News 8 spoke with social media expert Mike Merrill.