2/12: CDC unveils guidelines for reopening schools. New Orleans crack down on Mardi Gras celebrations.

The CDC plans to unveil long-awaited guidelines today for reopening K through 12 schools, and we have details first from a draft internal summary obtained by CBS News. The defense will take center stage today in former President Trump's impeachment trial over the assault on the Capitol. This should be Mardi Gras weekend in New Orleans, but police are cracking down to prevent another jump in coronavirus cases. 65 million Americans are under winter weather alerts. A deadly Texas pile-up shows the dangers of a brutal weekend of weather ahead. This week's "60 Minutes" investigates one of the most sophisticated cybersecurity breaches in U.S. history. Investigators believe Russia is behind the massive hack that hit several federal agencies, including the Treasury, Commerce, and Justice departments.

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