M.S. Kohli led India’s first successful Everest expedition in 1965. Nine climbers reached the summit between 20 and 29 May.
The same year, Kohli led climbers on a secret surveillance mission to Nanda Devi. Bad weather forced a retreat. Equipment containing radioactive fuel was left behind and subsequently went missing.
Everest explains his reputation for expedition leadership. Nanda Devi raises a different question: how should we distinguish a potential hazard from proven harm?
Sources: Everest speech. · Mission interview.
1. Who was M.S. Kohli?
2. What happened on Everest in 1965?
Nine climbers reached the summit in four teams
The expedition achieved India’s first successful ascent of Everest. Earlier Indian attempts in 1960 and 1962 had turned back below the summit.
The nine summiters climbed in four teams, rather than one group of nine. The first three summit teams each had two climbers. The final team had three.
Avtar Singh Cheema and Nawang Gombu reached the summit on 20 May. Gombu had already climbed Everest in 1963. He became the first person to reach its summit twice.
The expedition made India the fourth nation with a successful Everest expedition. The first was the British expedition in 1953. Swiss and American expeditions followed.
Sources: Everest climb account. · Everest speech.
The diagram counts successful summiters, not everyone who joined or supported the expedition. Add the four groups: 2 + 2 + 2 + 3 = 9.
Sources: Everest climb account.
Why does the leader differ from a summiter?
Leading an expedition does not mean personally reaching its summit. Kohli led the Everest team. His name is absent from the nine successful summiters listed above.
The expedition needed camps, ropes, food, oxygen, weather information and communications. Other climbers carried loads and helped summit teams move between camps.
Oxygen supplies limited the number of summit attempts. When an avalanche buried oxygen bottles, team members dug them out. Recovering those bottles helped the final summit team continue.
Think of a relay team’s preparation. A result depends on more than the person crossing the finish line. The comparison explains teamwork; it does not make mountaineering a race.
The nine-summiter total was a record for one Everest expedition at the time. A German-French expedition placed more climbers on top in 1978, 13 years later.
Sources: Everest climb account. · 1978 climb account.
3. Why did Kohli go to Nanda Devi?

A surveillance operation with a different objective
The 1965 Nanda Devi mission was a covert India–United States operation. Kohli led its team of climbers. The aim was to monitor China’s nuclear and missile activities.
A high Himalayan location offered a vantage point for spy gear. The mission sought intelligence, while the Everest expedition sought a climb to the top. The two operations shared a leader and year, but had different purposes.
Severe weather forced the Nanda Devi team to turn back. The climbers left gear on the mountain because they could not bring it down safely. A later search failed to locate the missing gear.
Sources: Mission interview. · Kohli’s book. · India–US record.
What does “nuclear-powered” mean here?
The gear’s power source contained plutonium-238. This radioactive material gives off heat as it decays. A generator can turn that heat into electric power.
The generator supplied power to spy gear. It was not a nuclear bomb. People fear a leak because the fuel is radioactive.
Keep three parts separate: radioactive fuel, electricity supply and spy gear. The fuel supplied heat. The generator produced electricity. The powered gear gathered or sent signals.
Sources: Nanda Devi and Nanda Kot. · Heat and power.
The diagram explains the power supply, rather than a weapon’s operation. The fuel must stay sealed and be handled with care.
Sources: Heat and power. · Nanda Devi and Nanda Kot.
Searches, later gear and environmental uncertainty
Search teams returned to Nanda Devi in 1966 and 1967. They did not recover the missing device. A new device was installed on nearby Nanda Kot in 1967.
Do not treat a Nanda Kot installation as recovery of the original Nanda Devi gear. A new device and a missing device are different objects.
The concern is a possible leak of radioactive fuel into streams feeding the Ganga river system. A route for a leak does not prove that a leak took place.
The 2021 Chamoli disaster should also be kept separate from speculation about the device. Research identified a large rock-and-ice avalanche from Ronti Peak as the disaster’s trigger.
The study does not link the lost power source to the rock-and-ice fall. A failed search also does not prove that the lost fuel is safe.
Sources: Mission interview. · Mission history. · Nanda Devi and Nanda Kot. · Chamoli study.
4. What honours and later work followed?
Recognition, conservation and writing
Kohli received the Padma Bhushan for his Everest leadership. The expedition’s members also received the Arjuna Award. Read about the wider National Sports Awards framework.
In 1989, Kohli established the Himalayan Environment Trust with support from Sir Edmund Hillary and other mountaineers. The trust promoted protection of the Himalayan environment.
He served as President of the Indian Mountaineering Foundation from 1989 to 1993. He helped run the sport and worked to protect the mountains.
His books include Nine Atop Everest and Spies in the Himalayas. The latter, written with Kenneth Conboy, covers the secret mountain missions.
For revision, connect each achievement with its purpose. Everest concerns expedition leadership. Nanda Devi concerns intelligence gathering and an unresolved lost device. The trust concerns mountain conservation.
Sources: Team awards. · Kohli profile. · Life story. · Kohli’s book.
5. Review your understanding checks
0 of 5 answered · 0 correct
This score lasts for this page session. The five practice MCQs below are a separate activity.
6. Questions and answers
How can four teams produce nine summiters?
The first three teams each had two successful climbers. The final team had three. Their combined total was nine.
Did Kohli personally summit Everest in 1965?
Kohli led the expedition but was not among its nine summiters. Leadership included planning, supplies and support for the climbing teams.
Was the missing gear a nuclear weapon?
No. Radioactive fuel supplied heat for generating electricity. The gear’s purpose was surveillance.
Does a contamination risk prove harm occurred?
No. A hazard can exist without proof of a particular harmful event. Establishing contamination requires evidence of a release and exposure.
7. Practice: 5 MCQs
Apply the distinctions between summit teams, expedition leadership, surveillance and conservation.
0 of 5 answered Question 1 of 5 Question 2 of 5 Question 3 of 5 Question 4 of 5 Question 5 of 5
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