India and the USA shared a common fear about the nuclear capabilities of China. Owing to the extreme remoteness of Chinese testing grounds, strict secrecy surrounding the Chinese nuclear programme, and the extreme difficulty that an Indian or American would have passing themselves off as Chinese, it was almost impossible to carry out any HUMINT operation. So, the CIA in the late 1960s decided to launch an ELINT operation along with R&AW and ARC to track China's nuclear tests and monitor its missile launches. The operation, in the garb of a mountaineering expedition to Nanda Devi involved celebrated Indian climber M S Kohli who along with operatives of Special Frontier Force and the CIA - most notably Jim Rhyne, a veteran STOL pilot - was to place a permanent ELINT device, a transceiver powered by a plutonium battery, that could detect and report data on future nuclear tests carried out by China. The monitoring device was near successfully implanted on Nanda Devi, when an avalanche forced a hasty withdrawal. Later, a subsequent mountain operation to retrieve or replant the device was aborted when it was found that the device was lost. Recent reports indicate that radiation traces from this device have been discovered in sediment below the mountain. However, the actual data is not conclusive.