Janie Rios and her husband Dan headed back to Denver, Colorado Monday after spending a week and a half in Birmingham. They have ties to the area and although they weren't traveling Sunday, they were aware of the bomb threat at the Birmingham-Shuttlesworth International Airport.
"There's crazy people everyone. You must be aware of what's going on around you," said Rios.
Birmingham Police confirm a threatening note was left in a bathroom of the airport. An employee found the note. A short time later, hundreds were told to leave the building.
"The note was passed along to our officers that were at the airport. They made the decision along with the airport personnel to go ahead and clear the airport. It was cleared. We brought in our bomb dogs. They checked the entire airport. Nothing was located," explained Sgt. Johnny Williams, Spokesman for the Birmingham Police Department.
"After the building had been cleared, we began to let passengers back in. It did impact about 500 passengers and about a dozen flights. They were either diverted or delayed," said Antioniette Herrera-Bast, Public Relations & Marketing Manager for the Birmingham Airport Authority.
Birmingham police say they were able to clear and secure the building quickly. On the heels of the terrorist attack in New York City in 2001 and the recent deadly shooting at LAX, police say there's a heightened sense of awareness.
"We take threats very seriously. And we've had plans in place to address this type of incident," said Williams.