More American troops and equipment have arrived in Poland. They join a few dozen elite troops who landed at the airport on Sunday. The deployment is part of President Joe Biden's efforts to demonstrate Washington's commitment to NATO's eastern flank amid rising tensions between Russia and Ukraine. Earlier the U.S. announced plans to send 1,000 soldiers stationed in Germany to Romania, and another 2,000 stationed in the U.S. are being flown to Germany and Poland.