House Speaker Nancy Pelosi on Thursday announced the establishment of a new committee to investigate the Jan. 6 insurrection at the U.S. Capitol. "It is imperative that we establish the truth of that day and ensure that an attack of that kind cannot happen and that we root out the causes of it all," the California Democrat told reporters during a briefing. Pelosi earlier this week signaled that she was poised to create the committee after Senate Republicans blocked the creation of an independent probe.