To make progress in this investigation of a suspected sonic attack against American diplomats, the U.S. will Cuba's cooperation. That seemed to be occurring, but no longer. This week Cuban scientists declared that there was no sonic attack at all. Instead, they blamed stress and mass hysteria.
Protecting foreign service members is one of the most important responsibilities of the U.S. State Department. So, reducing the number of American diplomats in Cuba – as well as expelling Cuban diplomats from Washington, to emphasize the situation's gravity – is entirely appropriate, especially since we still have no idea what actually happened.