They were testifying at the first hearing of a Congressional committee set up to investigate the attack.
Capitol Police Officer, Harry Dunn, who is black, said he was taunted with a racial epithet by the mob.
At least five hundred and thirty five rioters have been arrested so far, but prosecutors have only secured a few convictions.
The inquiry is being conducted almost entirely by Democrats, after most Republicans boycotted the committee.
However, two Republicans; Liz Cheney and Adam Kinzinger have broken ranks to join the investigation.
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