Video: World Tech Update, Jan. 17, 2013

Catch up on the week's biggest technology news

This week on World Tech Update (the IDG News Service's weekly video news wrapup): Facebook unveils Graph Search, the FAA grounds 787 Dreamliner aircraft, Cadillac debuts a high-end hybrid electric car, and more.

Follow WTU and Nick Barber on Twitter @worldtechupdate, @nickjb, and at facebook.com/worldtechupdate.

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