Take Two for Trump in talks with unnerved European allies

By Roberta Rampton and Jeff MasonWARSAW (Reuters) - U.S. President Donald Trump will get a chance to patch up trans-Atlantic ties this week when he meets with NATO allies still rattled by his failure on an earlier trip to embrace the principle that an attack against one member is an attack against all.Trump arrived on Wednesday in Warsaw, Poland, where the White House said he would showcase his commitment to the North Atlantic Treaty Organization in a speech and in meetings with a group of natio