CBS Sunday Morning, January 9, 2022

On this week's "CBS Sunday Morning," a panel of historians is releasing its third collection of essays analyzing and assessing the accomplishments and failures of a presidential administration. However, for the first time, a former president, Donald Trump, spoke to the historians to offer his own take on his time in office. Correspondent Rita Braver talks with Princeton University's Julian Zelizer, who assembled the panel, and with the academics who unpack history's first judgment of the 45th president.

Jane Pauley marks the end of an era, when Blackberry, whose mobile devices once served up to 85 million subscribers worldwide, pulled the plug on its phones, shutting down service for good.

Ever wonder where the theme song from "The Mary Tyler Moore Show" came from? Mo Rocca talks to legendary singer/songwriter Sonny Curtis -- who was present at the start of rock and roll.

David Pogue looks at how TikTok is rewriting the rules of comedy, especially during the COVID lockdown, and talks with TikTokers about their unusual path to fame.

Finally, we pay tribute to groundbreaking actor Sidney Poitier, who died this week at age 94, as well as film scholar and actor Peter Bogdanovich, whose works included "The Last Picture Show" and "Paper Moon." He died this week at the age of 82.

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