Cuba mystery: What theories US investigators are pursuing
(WorldNews Mexico)

Either way, suspicion has fallen on Cuba. But investigators also are examining whether a rogue faction of its security services, another country such as Russia, or some combination is to blame, more than a dozen U.S. officials familiar with the investigation told The Associated Press. Those officials spoke on condition of anonymity because they weren’t authorized to publicly discuss the investigation. The AP also talked to scientists, physicians, acoustics and weapons experts, and others about the theories being pursued. Perhaps the biggest mystery is why the symptoms, sounds and sensations vary so dramatically from person to person. Of the 21 medically confirmed U.S. victims, some...