U.S. troops deploy in Bulgaria as Mattis meets NATO in Brussels

U.S. troops deployed in Bulgaria on Wednesday and armored vehicles and heavy equipment are to arrive by the end of the week under a planned NATO operation to support its Eastern European allies, the Bulgarian defense ministry said.The U.S. deployment at the joint U.S.-Bulgarian military base at Novo Selo in the east of the Black Sea country is part of operation Atlantic Resolve, aimed at showing Moscow Washington's commitment to its allies, the ministry said.In moves agreed last year under forme