latest from san francisco. >> reporter: hfly armed officers are very visible at super bowl events this week. the san francisco bay area is expected a million visitors and keeping everyone safe has been state and local police agencies. >> the number one mission in special events is prevent acts of terrorism. >> reporter: on the ground, in the water, and in the air. police are using high tech equipment to search for explosives and watch out for any suspicious activity. >> put eyes on any one within the 30 nautical mile rateous. >> reporter: intelligence and data funnels to the fbi center not far from levi stadium. where police agencies can instantly share information. authorities admit suspects acting on their own are a concern. >> it's all about identifying the lone wolf before he or she acts. >> reporter: super bowl

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