President Andrzej Duda has said that the Solidarity trade union is entitled to expect and demand more social benefits. The president was speaking at the union's 30th-jubilee congress in Zakopane, on Thursday. Solidarity shot to fame in the early 1980s when, under the leadership of Lech Walesa, it played a pivotal role in bringing down the Iron Curtain. Following the collapse of communism it became a normal trade union, protecting the rights of its members.