Pelosi tells Democrats that the House will begin impeachment proceedings "with urgency." / The Guardian

The House releases its Articles of Impeachment, charging Trump with "incitement of insurrection." / CNN

"The key issue is this: One of the three branches of the federal government has just incited an armed attack against another branch." / The New York Times

At least 25 domestic terrorism cases have now been opened. / Reuters

Pence—though not Trump—will attend Biden's inauguration, and apparently the vice president has not spoken with his boss since the insurrection. / NBC News

US Capitol Police Officer Howard Liebengood, who was among those who responded to the attack on the Capitol, has died of an apparent suicide. / The Washington Post

Posts on pro-Trump forums continue calls for violence ahead of Inauguration Day. / NPR

Pro-Trump militias’ plans are chilling, but their endgame is murky. / The Intercept

"We have to make politicians scared again." The day before the attack on the Capitol, a pro-Trump group threatened officials in rural Northern California. / Los Angeles Times

How planning and coordination failures by law enforcement left the Capitol vulnerable on Wednesday. / The Washington Post

Outgoing Capitol Police chief: "My concern is if they don’t get their act together with physical security, it’s going to happen again." / The Washington Post

"That was a heavily trained group of militia terrorists that attacked us." According to police officers on the scene, the insurrectionists were well organized—and some were cops. / BuzzFeed News

Police departments across the US are launching internal probes to identify officers who took part in the insurrection. / The Washington Post

A review of more than 120 people facing charges in the insurrection shows they're Trump fanatics and not—as right-wing mouthpieces have claimed—Antifa. / Associated Press

The West Virginia lawmaker who was part of the insurrection has resigned. / BuzzFeed News

An observer of pro-Trump forums says election chatter over the summer, when Trump's campaign was doomed but supporters convinced themselves otherwise, helped fuel the idea of fraud, ushering the way to the Capitol attack. / GQ

Amazon kicks Parler off its web hosting, and Apple has removed the app from its store. / NPR

Parler CEO: "Every vendor from text message services to email providers to our lawyers all ditched us too on the same day." / The Verge

Payment processor Stripe, which handles card payments for Trump's campaign and fundraising efforts, shuts down Trump's account. / The Wall Street Journal

The PGA announces that it will no longer hold its 2022 championship at Trump's Bedminster course. / The Guardian

Congress's attending physician tells House members they may have been exposed to the coronavirus by those who entered the Capitol on Wednesday. / Vox

"At some point, even the media people who didn’t elevate Trump’s rigged-election nonsense are going to have to grapple with their own complicity in the Trump story." / Columbia Journalism Review

"Students across America are watching." How teachers are trying to explain what happened on Wednesday. / The Washington Post