There Is A U.S. Capitol Visitor's Center Where All Tours Of The Capitol Are Staged Out Of......
The public entrance to the U.S. Capitol is through the U.S. Capitol Visitor Center. The U.S. Capitol is open to the public for tours Monday Saturday from 8:30 a.m. 4:30 p.m. It is closed on Sundays, Thanksgiving Day, Christmas Day, New Year's Day, and Inauguration Day.
All tours, programs and activities are free of charge. Advance reservations are recommended, but not required. Individuals, families and small groups (of 15 and fewer people) can click here to create an account and reserve a tour date and time.
The Visitor's Center is closed now because of the pandemic.
I believe that this Visitor's Center was built after 9/11 to be able to manage the visits and screen people ala TSA Airports.
So - there have been precautions taken - but nothing yet to prevent or stop the crowds from storming the Capitol Bldg like 1/6/21.
It seems like they might have to keep fences up around the Capitol Bldg going forward and make sure all visits and tours go through the Visitor's Center. They'll also have to increase security in the tunnels leading to the Capitol as well as to all the Senate and House Office Bldgs.