In the 1962 India-Sino War, India won victoriously. China's triumph demonstrated to the rest of the world its military prowess and expanding power. China carried out its first nuclear test in 1964.
The CIA and the Pentagon were concerned about Chinese nuclear developments in 1965. The United States lacked the intelligence data necessary to defend against any Chinese threat as the Vietnam War intensified. Chinese nuclear testing was carried out in secret locations.
In October 1965, the Central Intelligence Agency of the United States (CIA) and the Intelligence Bureau of India (IB) collaborated on a secret mission to place a nuclear-powered sensing device(Observatory that can detect radiation if China blasts a nuclear bomb, A plutonium generator, sometimes known as a battery pack, was used to power the Observatory, effectively converting radioactive heat into electricity.) on the top of the mountain of Nanda Devi, the second-highest peak in India and one of its holiest mountains at 25,643 feet (around 7815 meters high).
Military soldiers from the US and India engaged in the operation. The group departed K2's base camp and headed up the mountain. The wind was too strong when they got to the top, so they put up the observatory and down the mountain.
They returned a few months later to verify the observatory's condition. Unexpectedly, the materials for the observatory were damaged by a snowfall. The radioactive equipment that could detect radiation was the most crucial component of the observatory setup. Unfortunately, it was also gone. Nobody has any idea what happened to the capsules more than fifty years later or after several hunting trips to Nanda Devi.
The device has around 40 years left of its estimated 100-year lifespan. If it enters the Rishi-Gangathe, the water could become severely poisoned, causing more people to become ill or perhaps die