[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/POLITICS/01/08/inauguration.security/art.capitolpreps.cnn.jpg caption="Inauguration preparations at the Capitol began before the Thanksgiving holiday."]
WASHINGTON (CNN) - Planning to attend the presidential inauguration this month in Washington? Expect a fortress-like city busting at the seams.
An influx of nearly 2 million people is expected to hit the streets of the nation's capital alongside an unprecedented security presence for the swearing in of the nation's first African-American president.
Police will be shutting bridges across the Potomac River into Washington, along with a huge chunk of downtown D.C.
Security officials are investigating any and all potential security threats to Barack Obama.
Homeland Security officials said they have no credible reports indicating that there's any terrorist threat to the inauguration, and there are no adjustments being made to the nation's threat level.
But officials also see the celebration as a potential target because it's highly symbolic and highly visible and will bring hundreds of VIPs - including foreign leaders - into the city.