What We Know So Far: A Timeline Of Security At The Capitol On January 6

Thousands of Donald Trump supporters storm the United States Capitol building on Jan. 6.

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The Jan. 6 attack on the U.S. Capitol was either a security failure, an intelligence failure — or both.

How could security forces in the nation’s capital be so swiftly and completely overwhelmed by rioters who stated their plans openly on a range of social media sites? President Trump had even tweeted on Dec. 19: “Big protest in D.C. on January 6th. Be there, will be wild!”

Washington, D.C., is known for its multitude of law enforcement agencies — a fact reflected in the agencies involved in security on Jan. 6. The Metropolitan Police Department has jurisdiction on city streets; the U.S. Park Police on the Ellipse, where Trump’s rally took place; the U.S. Secret Service in the vicinity of the White House; and the U.S. Capitol Police on the Capitol complex.