U.S. Capitol police officers point their guns at a barricaded door that was vandalized in the House Chamber during a joint session of Congress on January 06, 2021 in Washington, D.C. Insurrectionists peek through the window of the door, which is broken.

Tragedy at the Capitol: Four Questions that Demand Answers

How can the U.S. Capitol, surrounded by one of the largest concentrations of law enforcement and national security personnel in the world, be so quickly overrun?

Just Security