Russia and China easily have the resources to carry out clandestine ops around the world. Given that this seems to do with signals / electronics, it may not req

Russia and China easily have the resources to carry out clandestine ops around the world. Given that this seems to do with signals / electronics, it may not require particularly large teams or equipment. I think many more countries could do this around the world... I'm not sure about Cuba, but maybe even yes.