There is an enduring image of an RK Laxman cartoon when India staged its first successful underground nuclear test at Pokhran in 1974. It shows Prime Minister Indira Gandhi walking into a room full of suited and booted Western men – symbolising developed countries.
The saree-clad Mrs Gandhi has her nose turned up in pride but is carrying on her shoulder a stick with a cloth bundle representative of India's beggars.
That image of India's entry into the elite nuclear club is only a milestone in a long chain of scientific events.

