Monday marks four years since the Jan. 6, 2021, attack on the U.S. Capitol, when a mob of then-President Trump’s supporters smashed their way into the building under the false belief that the 2020 election had been stolen. NPR’s Tom Bowman and Lauren Hodges, two journalists who were there that day, join William Brangham to discuss the Jan. 6 attack and its legacy in the years since.