"During the 70s, 80s and 90s, we faced explicit or implicit nuclear threats on several occasions designed to change our foreign policy course," he said.
"Fortunately, our leaders of those times were strong- willed and refused to be deflected. Since we tested and declared our nuclear weapons in 1998, we have not faced any such threats of nuclear blackmail," he said.
Menon was addressing the Sardar Patel Memorial lecture organised by All India Radio here.