More than 3,000 U.S. troops were welcomed by Polish Prime Minister Beata Szydlo and the country’s defense minister, Antoni Macierewicz, on Saturday in a NATO show of force. In the snowy, western Polish town of Zagan, Szydlo said it was an important day “for Poland, for Europe and our common defense” as the U.S. troops were sent under “Operation Atlantic Resolve” to reassure NATO allies against Russian threats.