We’re now only a week away from crowning an NCAA men’s basketball tournament champion. CBS Sports columnist Chip Patterson spoke to CBSN about his Final Four picks. Source

New details are emerging about Khalid Masood, the attacker in this week’s deadly rampage in London on Westminster Bridge and near the Parliament. A Saudi embassy statement says Masood taught English in Saudi Arabia under a work visa on at least two occasions. Jonathan Vigliotti reports. Source

President Biden will deliver his first address to a joint session of Congress on Wednesday night. Mr. Biden is expected to highlight a proposal to provide free preschool for 3- and 4-year-olds among other priorities. CBS News correspondent Laura Podesta reports on what else to expect from the speech, and CBS News White House reporter Bo Erickson join CBSN AM to discuss the president’s first 100 days in office. Source

Award-winning chef Andy Husbands started his career at age 14 with a job at a bakery. After culinary school, he worked at top kitchens across the country before returning to the Massachusetts. The Tremont 647 chef joins “CBS This Morning: Saturday” to discuss his journey and fifth cookbook, “Pitmaster.” Source

Domino’s Pizza is hotter than ever. One big reason has to do with marketing seven years ago that helped save the day when the company was going through negative sales. Michelle Miller visits the Domino’s headquarters in Michigan. Source

CBS News chief medical correspondent Dr. Jon LaPook and CBS News contributor Dr. Tara Narula join “CBS This Morning: Saturday” to discuss exercise during pregnancy and Obamacare’s impact on community health centers. Source

President Trump is predicting the eventual collapse of the Affordable Care Act, but is Obamacare really on life support? Dr. Meena Seshamani, former director of the Office of Health Reform at the Department of Health and Human Services during the Obama administration, joins “CBS This Morning” to discuss the current state of the ACA. Source

In a stinging loss for President Trump, the Republican effort to repeal and replace the Affordable Care Act collapsed Friday. Republican leaders pulled their replacement bill from the House floor when it became clear they didn’t have the votes to support it. Errol Barnett reports. Source

The cast of “Wilson” tackles the political implications of comedy in 2017. Source

Police have identified the suspect in Wednesday’s London terror attack as 52-year-old Khalid Masood, a British citizen. CBS News’ Teri Okita joins CBSN from London with the latest details. Source