Did you know that the movie "Parmanu" is inspired by true events? It is inspired by the successful Pokhran II nuclear tests that have put India on the map as a nuclear superpower. It was India's proudest moment as they announced themselves as an atomic power enriched country.
The whole process started right around ten days before the tests with the weapons being transported from BARC in Mumbai to Pokhran on May 1. To not attract any suspicions, the whole transportation was done by using just four trucks filled with the gadgets rather than a full escort. Pokhran-II had a test on five powerful blasts. The first among the five was a fusion bomb, and the rest of the four was the fission bombs. These explosions were conducted with a fission device and low yield thermonuclear device. The whole process was conducted in such a way that the Americans may not find out about it. The burrowing of the poles was done only in the evening and the heavy equipment was too put back above them every morning to avoid any detection. The earth was dug out in such a way that it seemed like a dune. These plans had come around 1974 by VP Singh and Rajeev Gandhi and had received the approval of Narshima Rao, but the whole process had to be stopped because it was caught by the spy CIA satellites.