The idea that Cuba had invented some never-before-seen sonic weapon always seemed like a stretch, given the general impoverishment of the island. It’s much more believable that this is a recycling of 40-year-old techniques pioneered by the Soviets. (John Sexton, Attacks similar to the ones in Cuba happened during the Cold War, Hot Air 13 Nov. 2017)Indeed, the Americans have gone out of their way to signal the connection. "U.S. intelligence officials are closely studying Cold War-era Soviet technology as they seek to determine whether an electronic weapon was used to disorient and injure 24 American officials in Cuba earlier this year." (Ali Watkins, Cuba attack mystery may be Cold War flashback, officials say, Politico 12 Nov. 2017)-
But it is also to suggests that the old conditions that underscored the need for the Embargo have come back in place--that Cuba has again become an outpost of the Soviets (now Russians) in their aggressive moves against the United States and its interests.