Four US A-10 Thunderbolt II attack planes are taking part in war games in Poland, as the nation expects about 10,000 NATO forces at drills this year. Moscow says the military build-up at Russia’s borders will have a negative long-term impact. The A-10 aircraft are based in western Poland, at an airbase in Powidz, where they will be involved in a series of training missions until Friday, Polish army...