US hid fears of radiation in Moscow embassy in 70s from staff, documents reveal

President Ford and state secretaries complained to Soviet Union about health concerns over Moscow signal'

The US complained to the Soviet Union for more than a decade about microwave radiation directed at its embassy in Moscow, but kept concerns secret from embassy staff for nine years, according to newly declassified documents.

The reported microwave radiation came to be known as the Moscow signal" and was the source of frequent complaints from Washington. US officials were unsure of either the purpose of the signal or the potential health effects of long-term exposure to low-level microwave radiation.