India is gearing up to test-fire its most potent home-made ballistic missile in the coming days. The missile is an upgrade to the country’s nuclear deterrence arsenal, but the submarine that fires it is a game-changer. The K-4 submarine-launched missile has a range of 3,500 km and is scheduled for testing in mid-December, according to sources cited by the Economic Times. Previous tests scheduled for November had been scuppered by a cyclone off India’s eastern coast. A successful test would bring the nuclear-capable missile significantly closer to operational status. Read More…