February 28: Ukraine forces slowing down Russian advance. Markets react to war in Ukraine. Who is Ukraine President Volodymyr Zelenskyy?

<p>Ukrainian troops manage to slow the Russian military’s advance on Kyiv — this, as Vladimir Putin puts Russia’s nuclear forces on high alert and thousands attempt to flee Ukraine. We’re live in Kyiv, Lviv, Moscow and The White House. Plus, Stephanie Ruhle has the latest on how the crisis in Ukraine is being felt on Wall Street. And, an in-depth look at Volodymyr Zelenskyy and his unusual path to the presidency in Ukraine.</p>