WATCH: U.S. Capitol invasion was planned for weeks (Story continues below video) BY A.C. THOMPSON & FORD FISCHER / ProPublica NOTE: This story was originally published by ProPublica, a Pulitzer Prize-winning investigative newsroom. Sign up for The Big Story newsletter to receive stories like this one in your inbox. Members of the ultranationalist street gang known as the Proud Boys were easy to spot at the protests that flared across the United States throughout 2020, often in the middle of a brawl, typically clad in black and yellow outfits. But in December, as the group’s leaders planned to flood Washington to oppose the certification of the Electoral College vote this week for President-elect Joe Biden, they decided to do something different.