Heightened security at Reagan National Airport

WASHINGTON - Following the deadly terror attacks in Paris, there is heightened security at Reagan National Airport, FOX 5's Tom Fitzgerald reports.

Police officers wearing military-style uniforms were seen in the main terminal with long firearms on Tuesday. There was also a pre-planned training session for airport personnel on how to deal with an active shooter situation.

These concerns played out Sunday when an American Airlines flight from D.C. to Boston deplaned after the crew reported suspicious activity from two passengers. A K9 team swept the aircraft, no abnormalities were found, and the flight later departed for Boston.

Meanwhile, security changes are on the way at Reagan over the next few years. A $1 billion concourse expansion project will move TSA security from the gates to the front of the building.

"It is also an opportunity to be able to offer the latest protocol and latest type of equipment, but predominately the expansion of the security checkpoint is to accommodate the increased passenger," said Margaret E. McKeough of the Metropolitan Washington Airports Authority.

As we head into the holiday travel season, officials say you need to keep an eye on November 20, November 24 and November 25. Those dates have been identified as the busiest travel days at Reagan, and you will likely encounter long security lines.