On the CBS News "Weekend Roundup," millions of Texans lost power for days after a winter storm overwhelmed its electrical grid. President Biden has approved states of emergency there and also in Louisiana and Oklahoma. Dozens have died trying to keep warm. CBS's Omar Villafranca reports from the Lone Star state. Meanwhile, Republican Texas Senator Ted Cruz is being vilified over a badly timed trip to Cancun this week. CBS's Naomi Ruchim reports. It was a busy Friday for the president; for his first time since taking office, he addressed world leaders, calling for international cooperation on global issues. He also toured a facility in Michigan, where Pfizer makes the COVID19 vaccine. The distribution of the vaccine has been backlogged because of the winter weather. CBS's Debra Alfarone has the latest. We'll hear from CBS's Cami McCormick on why many U-S troops are refusing the vaccines. CBS's Jim Axelrod reports on the death of Conservative talk show host Rush Limbaugh, who was given the Presidential Medal of Freedom by former President Trump. The Biden Administration is hoping to achieve something no president has done in 35 years - getting comprehensive immigration reform passed by Congress. CBS News Immigration reporter Camilo Montoya-Galvez joins Allison to explain the Democratic plan introduced this week that would put millions of undocumented immigrants on the path to citizenship. In this week's Unifying America segment of the Kaleidoscope, we look at why so many Black people have concerns about taking the Covid-19 vaccine. In Alabama, home of the infamous "Tuskegee Syphilis Study," suspicion runs particularly deep. Allison speaks with former Tuskegee Mayor, and President of the Tuskegee Macon County Community Foundation Lucenia Dunn about why she and many other African Americans are so skeptical. "CBS This Morning" host Anthony Mason speaks to some of country's biggest stars about a genre that is trying to open up to diverse voices. Plus, NASA's "Perseverance" Rover has touched down on Mars.

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