Health security

The Secret History of Diplomats and Invisible Weapons

In 1965, medical workers began showing up at the American embassy in Moscow, drawing blood from the employees inside. The American diplomats were told that doctors were looking for possible exposure to a new type of virus, something not unexpected in a country known for its frigid winters.

It was all a lie. The Moscow Viral Study, as it was called, was the cover story for the American government’s top secret investigation into the effects of microwave radiation on humans. The Soviets, it turned out, were bombarding the embassy in Moscow with low-level microwaves. The “Moscow Signal,” as officials in Washington called the radiation, was too low to do any obvious harm to the people in the building. At five microwatts per square centimeter, the signal was well below the threshold needed to heat things, as a microwave oven does. Yet it was also a hundred times more powerful than the Soviets’ maximum exposure standards, which were much more stringent than those of the United States. That was cause for alarm.