National Security Adviser O’Brien says that the FBI doesn’t know if the shooter was acting alone but Saudi Arabia has committed to cooperate with the investigation. Source

Former chairman of the conservative House Freedom Caucus defended President Trump against what is all but certain impeachment in the House of Representatives. Source

Evidence for impeaching President Trump will be presented at a public hearing on Capitol Hill on Monday. The House Judiciary Committee chair says it’s the “worst nightmare” of the Constitution’s framers, while the president called it a “total hoax.” Nikole Killion reports. Source

North Korea says it carried out another important test and warned it’s looking for new ways to get concessions from the United States. President Trump tweeted that leader Kim Jong Un has far too much to lose if he acts in a hostile way. Roxana Saberi reports. Source

Last year, Bill Whitaker reported on “60 Minutes” about leaked records of the Catholic Diocese of Buffalo, New York. On Wednesday, Pope Francis accepted Bishop Malone’s resignation. Source

Beloved “Sesame Street” puppeteer Caroll Spinney, who was behind Big Bird and Oscar the Grouch, has died. He was 85. Source

The French government and President Emmanuel Macron is vowing to press ahead with its sweeping reform of the country’s pension system. This has sparked outrage and new protests across the country. Elaine Cobbe reports from Paris. Source

The major winter storm that slammed parts of Northern California is heading west. Before it left, it caused a rock slide that shut down a section of Route 1 near Big Sur. Source

With new technology to edit genes, scientists are now working on things that once seemed impossible. But what are the boundaries? Source

In this edition of 2020 Daily Trail Markers, New Jersey Senator Cory Booker said he recieved more than a million dollars in donations to his presidential campaign after calling out the lack of diversity within the Democratic field. 2020 Campaign reporter Adam Brewster joins CBSN with the latest on Booker’s surge and more news from the campaign trail in Iowa. Source