February 25: Ukraine capital under attack as troops advance. CDC to loosen indoor mask guidelines. Winter weather affecting millions.

<p>The latest on the crisis in Ukraine — Kyiv is under attack as Russian forces advance. We’re live in Kyiv, Mariupol and the White House. Plus, the CDC is expected to relax indoor masking requirements for most Americans. And, Al Roker is tracking wicked winter weather affecting millions.</p>