sarah deloff is in phoenix. we are three days away. i imagine security is tight. >> you are correct. attractions like super bowl central behind me are already drawing huge crowds. therefore a huge security presence. >> excited fans. with divided loyalties. >> the hawks. it's in the bag. >> all the way. got brady, gronk. >> reporter: altogether in downtown phoenix a million people expected listening to free concerts climbing the 30-foot-tall rock wall known as the grand canyon experience. >> it becomes easy after a while. >> reporter: keeping the crowd safe at attractions and the stadium come game day is no small task. federal, state and local authorities joined forces and are reactivating the see something/say something campaign. they have received no specific threats but are on the lookout for anything including lone wolf-style attacks. >> we are aware that while the majority of people view the super bowl as an exciting culmination of the football season, others see these events as a high profile target on a world stage. >> reporter: