The Ukrainian army is slowing Russian forces 18 miles north of Kyiv, Ukraine's capital | ABC News

Plus, more than half a million refugees have fled Ukraine as more people try to find safety amid an invasion by Russia.SUBSCRIBE to ABC News on YouTube: https://bit.ly/2vZb6yPLatest updates: http://abcnews.go.com/Watch FULL EPISODES on Hulu: http://abcn.ws/3bzvQQn#ABCNews #Ukraine #Russia #Invasion