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slash UK slash AI for people. On this New Year's Day, America hits 20 million COVID cases.

The new, more contagious strain is found in a third state, and researchers say it could be the

dominant strain by spring.

New details on the Wisconsin pharmacist who admits to deliberately spoiling hundreds of vaccine doses.

The potential charges, and what happens to dozens of patients who may

have received defective vaccine. Also tonight, the slow rollout. Why is distribution falling so

far short? And why big box stores could soon be vaccine centers? Breaking news, a rare rebuke. For the first time,

Congress overrides a veto by President Trump as the defense bill becomes law.

Last Ditch Challenge. The president calls on supporters to march on Washington to protest the election,

and more than a hundred House

Republicans may try to block Joe Biden's certification as president.

Only on CBS News. A Princeton scholar who was held hostage for years by Iran has an ominous

warning for the incoming president about Iran's intentions and what

that could mean for America. New year, new severe weather. Cars sliding off roads and

blizzard-like conditions in the plains, plus new tornado threats tonight. Hot on camera,

police rescue a mom and daughter from the chilly waters of Baltimore's

inner harbor. And we go on the road with Steve Hartman, how a broken light became a beacon for kindness.

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