Hackers broke into a website for San Francisco's mass transit system Sunday and posted contact information for more than 2,000 customers, the latest showdown between anarchists angry at perceived attempts to limit free speech and officials trying to control protests that grow out of social networking and have the potential to become violent.

The hacker group known as Anonymous posted people's names, phone numbers, and street and email addresses on its own website, while also calling for a disruption of the Bay Area Rapid Transit's evening commute Monday. The transit agency disabled the effected website, myBART.org, Sunday night after it also had been altered by apparent hackers who posted images of the so-called Guy Fawkes masks that anarchists have previously worn when showing up to physical protests.

"Jeopardy!" host Alex Trebek says he snapped his Achilles tendon while running after a burglar who had stolen cash, a bracelet and other items from his San Francisco hotel room.

The 71-year-old Trebek tells KGO-TV that he also injured his other leg while falling down during the chase early Wednesday. He was on crutches later Wednesday when he hosted the National Geographic World Championship at Google headquarters in Mountain View.

Nestle is out to boost its share of the global breakfast cereal market with a dose of augmented reality supplied by French technology firm Dassault Systemes.

A marker printed on 26 million Nestle cereal boxes being sold in 53 countries lets people with Web cameras linked to computers play an augmented reality game starring the main character of the animated film "Rio."