Top security officials resign in wake of Capitol riot, said FBI missed warnings

Former U.S. Capitol Police Chief Steven Sund, former Senate Sergeant at Arms Michael Stenger and former House Sergeant at Arms Paul Irving resigned. They and others testified Tuesday about the attack.
2:11 | 02/24/21

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Transcript for Top security officials resign in wake of Capitol riot, said FBI missed warnings
From capitol hill now, we heard alarming testimony today about the deadly riots at the capitol. Police answering questions now about the lack of planning, some saying that the intelligence from the FBI came too late. The former capitol police chief testifying the criminals, quote, came prepared for war. Here's our chief justice correspondent Pierre Thomas tonight. Reporter: In Washington today, the three men in charge of protecting the capitol on January 6th pointing the finger at the FBI and other intelligence agencies, telling congress they were never warned a band of violent insurrectionists was coming to unleash chaos in the name of former president Donald Trump. These criminals came prepared for war. Reporter: Lawmakers hearing from the former chief of the capitol police, Steven Sund, who resigned after the riot. None of the intelligence we received predicted what actually occurred. We properly planned for a mass demonstration with possible what we got was a military-style, coordinated assault. Reporter: But the FBI did send a bulletin on January 5th, one day before the riot, warning right-wing extremists were heading to Washington, preparing to fight a, quote, war. The officials who testified today saying that information was sent in an email, an email they did not see. I think if we have information that's coming in the day before a major event that has that level of specificity that it could get a little more attention than just being handled through an email or electronic format. Reporter: The failure to plan for the mob left capitol hill police officers like captain carneysha Mendoza vastly outnumbered. Captain Mendoza, who is also a veteran, telling lawmakers the insurrectionists used mill tafr-grade tear gas. I received chemical burns to my face that still have not healed to this day. As an American and as an army veteran, it's sad to see us attacked by our fellow citizens. Reporter: And Dave, the charges keep coming. Thomas Webster has been arrested, accused of beating police with a metal flag pole during the January 6th attack, in what prosecutors are calling a fit of pure rage, David. Pierre Thomas with us tonight. Pierre, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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