Starting in November 2016, employees of the US Embassy in Havana, Cuba began complaining of being plagued by a strange and ominous sound. Many were found to have suffered severe physical side-effects as a result. In a plot that could have been lifted straight from the must ludicrous spy novel, it really is a story that has to be heard to be believed... Go to twitter@unexplainedpod, facebook.com/unexplainedpodcastorunexplainedpodcast.comfor more info. Thank you for listening.