Your Rundown:

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0:26 - 1:10 Iran nuclear talks happening in Vienna this week and why we're watching.

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1:10 - 1:42 What's happening in Washington, D.C.?

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1:42 - 8:44 The backdrop to all of this: The pandemic and what to know about variants.

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Here's Part I and Part 2 of Jenna's interview from early in the pandemic with Dr. Michael Lin, Stanford University.