When Bill Pickle reached his last day on the job as the Senate sergeant-at-arms more than a decade ago, he issued a stark warning to congressional leaders. Pickle said that the Capitol had security weaknesses that had long gone ignored by lawmakers and that this could allow an attack one day. It's a theme Pickle thinks ex-top security officials will share during their first public testimony in Congress since the Capitol insurrection. "I call it a systemic problem," said Pickle, who served in the role from 2003 to 2007. "Congress has been approached over the years to do a better job." The Senate Homeland Security and Rules committees expect to hear from the Capitol's three former top security officials ó as well as the current head of D.C.'s Metropolitan Police Department, Robert Contee ó in the joint hearing Tuesday. Watch the hearing live beginning at 10 a.m. ET. Former U.S. Capitol Police Chief Steven Sund, House Sergeant-at-Arms Paul Irving and Senate Sergeant-at-Arms Michael

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