After nearly 18 months of investigations, the House select committee on the Jan. 6 attack is set to hold its final public meeting Monday. The committee is expected to take the unprecedented step of making criminal referrals, urging the Department of Justice to prosecute former president Donald Trump on multiple charges. Lisa Desjardins looks back at what we've learned so far and what the committee's final report may reveal. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders