INDIANAPOLIS, Ind. -

The crowds and excitement have been building in Indianapolis as Super Bowl weekend gets started. An estimated 300,000 people were expected to pack into downtown Indianapolis, and their safety is the top priority for the city.

Police officers have been scanning every delivery truck to look for explosives. Security teams have been watching over every event from a massive command center and helicopters were used to get a look from above.

"This is probably the most secure place, except for the White House, on Super Bowl Sunday," said Gary Coons, Indianapolis' Homeland Security chief.

All that security is to keep things safe and fun.

The biggest crowds have been in Super Bowl Village, where people have been soaking up from high and low.

"Just to be down here and take it in and be a part of it is really amazing," Indianapolis resident Sarah Bustamante said.

People have been enjoying everything with unseasonably warm weather and heat offered everywhere, from flaming stations to under their feet.

"I think it's fun because you don't have to feel like you're in Alaska when you're really in Indiana," Indianapolis resident Kate Cunisse said.

The city has made a good impression. The NFL's commissioner said the city is a viable candidate to host another Super Bowl.