The lid was, however, blown in 1978. Indian newspapers reported that an electronic intelligence machine passed on by the CIA and mounted atop Nanda Devi in 1965 to track Chinese missile tests had gone missing.
The bigger worry was over the plutonium generator that powered the machine. As Prime Minister Morarji Desai assured a worried Parliament on nuclear safety, the mention of SFF, that had mostly manned the operation, slipped out.