In Europe, NATO forces have launched the biggest war games since the end of the Cold War, amid escalating tensions between NATO and Russia. About 50,000 soldiers from 31 countries are participating in the mock battle in Norway. This comes as Poland says the U.S. is welcome to station medium-range missiles in Poland and that it supports President Trump’s decision to withdraw from the 1987 Intermediate-Range Nuclear Forces Treaty with Russia. Experts warn Trump’s decision to withdraw from the landmark treaty could spark a new arms race.