It's been one request that absolutely nobody is willing to grant. While many NATO members are sending arms and aid to Ukrainians, President Volodymyr Zelenskyy's pleas for a no-fly zone over his country have been rebuffed. And there's a good reason for that.
Today: How a no-fly zone works, why allies are refusing to enact one and what happens next in Ukraine, where Russian forces continue to increase the destructiveness of their attacks...
GUEST: Abbie Shull, junior military and defense reporter at Business Insider