Just this fall, United States officials said they fear a directed energy or acoustic device has been used to disorient and perhaps to injure more than twenty U.S. Embassy personnel in Havana. The events harken back four decades to a well-documented use of such devices by the Soviets against the U.S. Embassy in Moscow. The Cuban attacks began over a year ago, around the time of the U.S. presidential election.
Microwave irradiation of the upper floors of the American Embassy in Moscow were said to have begun as early as 1953. It was not until much later that personnel working there were made aware. The issue was never formally resolved, though health effects of the radiation subsided after screens were installed on the side of the building which had been receiving the transmissions.
In the more recent Cuban case, U.S. officials were even exposed in their hotels and homes. Symptoms include nausea, memory issues, concussion-like symptoms and ringing in the ears. Cuba and Russia have made no secret of their collaboration on espionage work against the United States.