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Biden puts U.S. on path to global Covid vaccine leadership; sharp pivot from Trump failure

05:03

Rachel Maddow looks at President Joe Biden's promise to use any surplus vaccine to help with the necessary work of vaccinating the rest of the world, and marvels at the speed with which the Biden administration has put the U.S. on the path to hope and global leadership just 50 days after Donald Trump's worst-in-the-world performance on the coronavirus.