NUORO: In Nuoro, a remote city on the Italian island of Sardinia, a high stone wall rings the local prison, a fortress-like complex once renowned for holding high-profile mobsters and convicted terrorists far from the mainland. Only a handful of top mafiosi remain detained there and Sardinia is no longer seen as a dumping ground for criminals, instead building an international reputation around tourism. But that could change under a plan of Prime Minister Giorgia Meloni’s government which has alarmed residents.