The State Department of the United States has issued a travel warning for United States citizens who may be thinking about traveling to Cuba. This after 21 U.S diplomats and family members became ill after a mysterious sonic attack. The U.S. State Department is pulling all families of employees and nonessential personnel from Cuba. The American Embassy in Cuba will continue to operate with a 60% reduction in staff. CNN (@CNN) reported that the sonic attacks took place in hotels around Cuba that Americans are known to frequent. Cuban Foreign Minister Bruno Rodriguez denied that Cuba was involved in the attacks. He accused U.S. Secretary Of State Rex Tillerson of trying to politicize the events. U.S. officials say there may have been as many as 50 attacks. The most recent in August. Victims of the attacks have experienced long lasting symptoms, and in at least one case, a permanent loss of hearing.