(NBC News) The party is in full swing at Super Bowl Central in Phoenix, where a careful balance of celebration and security can be seen.
State, local and federal authorities, including Homeland Security and the FBI, are working together in the city and at the stadium.
High tech tools like bio-watch detectors and nuclear device sniffing teams are being utilized, and fans are urged to do their part via the renewed “See Something, Say Something” campaign.
“We think that public participation in our efforts is all the more important. Public vigilance, public involvement, public participation, and so we are representing this campaign in connection with the Super Bowl which is one of the most visible and watched events in America each year,” Secretary of Homeland Security Jeh Johnson said Wednesday.