. >> like curtis san derlan who has this message for the unvaccinated. >> take it. take it. do the right thing. >> cbs news, jacksonville. >>> this morning the congressional investigation into the deadly riot on the u.s. capitol is getting underway. it's getting back to the causes of the attack. according to a review of court documents, at least 543 are being charged and 23 are pleading guilty and the fbi has yet to identify more than 300 individuals believed to have committed violent acts on the capitol grounds. laura podesta is in new york. what can you tell us about what we can expect today? >> reporter: good morning, anne-marie. today we'll hear opening statements, including one from congresswoman liz cheney. the last-minute decision to have cheney speak is to support the argument this party is in fact bipartisan. four officers say they were physically assaulted by the mob on january 6th. >> reporter: 6 1/2 months after a crowd stormed the capitol, they're holding the first hearing. >> an important opportunity to remind everybody about the necessity of accountability for