Federal security officials fear that attacks on fiber optic systems in the Bay Area may pose a threat to Super Bowl 50. Security experts are aware of a number of sabotages against fiber cables in the same area. At least, at least, 10 fiber optic cables were sabotaged between July 2014 and June 2015, and according to Michele Ernst, a spokeswoman for the FBIs San Francisco field office, there have been 15 attacks against fiber optic lines in the area since 2014. Most of the incidents occurred in an area within 40 miles from the stadium, some of the attacks very close to the locations interested by the event.”]
Source: https://securityaffairs.co/wordpress/43773/cyber-crime/super-bowl-50-attacks.html