Heightened security on Capitol grounds
The nation's capital has ramped up security ahead of Biden's first State of the Union address tonight.
Up to 700 National Guard troops have been made available to assist local law enforcement, and a controversial inner-perimeter fence once again surrounds the U.S. Capitol.
The U.S. Capitol Police have also been working in tandem with local, state and federal law enforcement agencies on a "security plan to prevent any disruption to the important work of Congress," Capitol Police Chief Tom Manger said in a statement earlier this week.
-ABC News' Noah Minnie