Former U.S. ambassador to Ukraine William Taylor joined 'Fox News Live' to discuss Putin's invasion into Ukraine and NATO's response. #FoxNews ... WILLIAM TAYLOR: The change in where we are now compared to where we were on February 23rd... the day before the invasion, is dramatic. We are now in a different world. Russia has put us in a different world, and it is true that they had invaded Ukraine in 2014. So the Ukrainians have been fighting this war for eight years, but that big invasion that President Putin decided to undertake on February 24th changed everything, and that means that we have to now focus on Russia, and NATO has to focus on Russia like never before. So that is a change, and Stoltenberg is exactly right. NATO has to respond, is responding, and again, the weapons that NATO provides to Ukraine is that's in NATO's interest. That's in all the members of NATO's interest for Ukraine to win this war. ...