Officers could be seen all around, even from the perch atop a platform at Phoenix Sky Harbor Airport, where an extra tier of security is in place.
It was a busy Saturday morning, and already Berry, the black lab, was well into her work day.
She's one of 20 passenger-screening canines brought in from airports around the country to work alongside TSA agents, trained to detect explosives.
As soon as a decoy bag was wheeled through, Berry was ready.
"The way that we train, we train from the smallest amount to the biggest amount," said TSA canine handler Venacio Luz. "As soon as she gets a hit from any odor, she'll take me to her."
TSA officials say there will be double the number of travelers Monday, expecting 80,000 people at the airport following the Super Bowl and Phoenix Open, and the bomb sniffing dogs are part of the process to get people through security and onto their flights.
"Earlier this week when Homeland Security Secretary Jeh Johnson was in town, he said there is no specific threat. What we know is these dogs provide a deterrent to people who may want to conduct any type of suspicious activity. When they see dogs are in place, that would be something that would be a sign to them that this isn't the place to do that," said Lorie Dankers of TSA Public Affairs.
The fan experience in Downtown Phoenix isn't the place to do that, either.
It's running smoothly, in no small part due to increased security presence, including Phoenix police officers staffed at every street corner.
But Sunday, all eyes, including federal and local authorities, will be on Glendale at University of Phoenix Stadium for Super Bowl XLIX.