It's the latest indication that the frontline NATO nation is increasingly considering nuclear protection as fears of Russia grow.

As President Trump casts doubt on U.S. alliances, Poland needs to double its military manpower and consider more destructive weapons, Prime Minister Donald Tusk said.

The president of Poland, Andrzej Duda, has repeated his call for the US to base nuclear weapons on Polish soil. In the presidential palace in Warsaw, he told me that it would make Poland stronger and safer,