WASHINGTON (NewsNation Now) — U.S. Capitol police are facing a wave of scrutiny about how rioters forced their way into a federal building with the Vce President and members of Congress inside.

How did this happen? Where was the breakdown? NewsNation Joe’s Donlon spoke with Terry Gainer, who served as Capitol police chief from 2002 to 2006.

Watch the full, uncut interview in the player above.