India's latest Agni-V missile test, just days before the PM's visit to China, got tongues wagging this week. Was it a message to Beijing? Islamabad? Or both? In this episode of In Our Defence, national security expert Sandeep Unnithan joins host Dev Goswami to unpack the story of how and, more importantly, why India became a nuclear power. From the first "Smiling Buddha" test in 1974 to the Pokhran-II Shakti series in 1998, and today's Agni-V, this is the story of India's nuclear weapons programme. Produced by Taniya Dutta Sound Mix by Suraj Singh