Noting that terrorists have easier and cheaper ways of wreaking havoc, Menon said the nuclear weapons are complex devices that are difficult to manage, use and deliver and require very high level of skills.
"To my mind, the real threat (to Pak nukes) is from insiders, from a Pakistani pilot or a brigadier who decides to wage nuclear jihad, with or without orders," Menon writes in his book titled "Choices: Inside the making of India's Foreign Policy."
Menon says Pakistan is the only nuclear weapon programme in the world that is exclusively under military control.
"There are good reasons why no other country chose to go down this path," he said.
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Menon writes that India has nuclear weapons for the contribution that make to its national security in an uncertain and anarchic world by preventing others from attempting nuclear blackmail and coercion against India.
"Unlike in certain NWS, India's nuclear weapons are not meant to redress a military balance, or to compensate for some perceived inferiority in conventional military terms, or to serve some tactical or operational military need on the battlefield," he notes.
"Pakistani tactical nuclear weapons use would effectively free India to undertake a comprehensive first strike against Pakistan," he said.
"There are several responses short of war available to a state like India," he writes.
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