It has one of the largest SDRs and Voting Power in the IMF.[18] The country is a cultural superpower and it has close ties with the rest of the Catholic world as the home of the Pope. Italy is a key player in maintaining international security, especially in the wider Mediterranean region,[note 1] by performing air policing duties for its allies and commanding multinational forces in foreign countries. The country has therefore developed considerable military capabilities by building two aircraft carriers and establishing some overseas military bases.