WASHINGTON (AP) — Former security officials are testifying publicly for the first time about the Jan. 6 insurrection at the Capitol, casting blame on the Pentagon, the intelligence community and each other.

Former U.S. Capitol Police Chief Steven Sund on January 6th U.S. Capitol Attack: “A clear lack of accurate and complete intelligence across several federal agencies contributed to this event, and not poor planning by the United States Capitol Police,” pic.twitter.com/4rg4wJtIxr

— CSPAN (@cspan) February 23, 2021

Congress is hearing from the former security officials about what went wrong when a violent mob laid siege to the Capitol and interrupted the counting of electoral votes.

Three of the four testifying Tuesday resigned under pressure immediately after the attack.

Capitol Police Chief Steven Sund will described a scene “like nothing” he had seen in his 30 years of policing.

Sen. @RoyBlunt asks about request for National Guard assistance.

Former Senate House at Arms Paul Irving: “I did not receive a request for approval for National Guard until shortly after 2pm…”

Former U.S. Capitol Police Chief Steven Sund: “It was 1:09, sir.” pic.twitter.com/erKktiAplx

— CSPAN (@cspan) February 23, 2021