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With scientists racing to understand how existing vaccines protect against Omicron, ABC's Martha Raddatz gets rare access to Moderna’s manufacturing facilities to see how they are preparing to combat the new variant. After the Supreme Court heard historic arguments over a restrictive Mississippi abortion law, Terry Moran and Kate Show analyze the future of abortion rights as the Court’s conservative majority considers overturning Roe v. Wade. And the Powerhouse Roundtable discuss Congress’ busy December agenda, the political divide over vaccine mandates, and concerns over Russian aggression toward Ukraine.