New Delhi, May 13 -- "The Buddha is smiling," was the code message flashed to former Prime Minister Indira Gandhi when India successfully detonated its first nuclear bomb at the Pokhran Test Range in Rajasthan on May 18, 1974.

The date was Buddha Purnima, the festival marking the birth of Gautama Buddha. Hence, the codename. The test prompted Pakistan to accelerate its nuclear programme, culminating in tests in 1998.

Fifty-one years later, Prime Minister Narendra Modi chose the same Buddhist festival day to deliver a strong message to Pakistan: "India will not tolerate any nuclear blackmail. India will strike precisely and decisively at the terrorist hideouts developing under the cover of nuclear blackmail". The Indira Gandhi government...