(This story originally appeared in on Dec 14, 2016)

NEW DELHI: India is getting ready to test its Agni-V intercontinental ballistic missile ( ICBM ) in its final operational configuration from Wheeler Island off Odisha after two years.Defence sources said preparations were on in full swing to launch the nuclear-capable Agni-V from its canister on a launcher truck towards December-end or early January . “There were some minor technical snags in Agni-V, which required tweaking of its internal battery and electronic configurations after its last test in January 2015,“ a source said.But India also conceivably wanted to exercise some strategic restraint while making a bid to join the 48-country Nuclear Suppliers Group , which China thwarted earlier this year. India, however, did manage to join the 34-nation Missile Technology Control Regime, as also ink a civil nuclear cooperation agreement with Japan recently .The impending fourth test of Agni-V , capable of striking even the northernmost parts of China, is in itself significant. “This will be the final test of the three-stage Agni-V , which will be tested for its full range, before the Strategic Forces Command (SFC) begins its user trials,“ the source said. The tri-Service SFC, established in 2003 to manage India's nuclear arsenal, will conduct at least two tests before the missile is produced in adequate numbers for induction.While Agni-V was tested in an “open configuration“ in April 2012 and September 2013, the third test, in January 2015, saw it being fired from a hermetically sealed canister mounted on a Tatra launcher truck. The missile's canister-launch version makes it even deadlier since it gives the armed forces requisite flexibility to swiftly transport and fire the 50-tonne missile from anywhere they want.Once the Agni-V is inducted, India will join the super exclusive club of countries with ICBMs (missiles with a range of over 5,000-5,500km) alongside the US, Russia, China, France and the UK.Apart from the shorterrange Prithvi and Dhanush missiles, the SFC has inducted the Agni-I, Agni-II and Agni-III missiles (see graphic).While these missiles are mainly geared towards Pakistan, the Agni-IV and Agni-V are specifically meant for deterrence against China. China, of course, is leagues ahead in terms of its missile and nuclear arsenals (see graphic).But the Indian defence establishment believes the Ag ni-V is sufficient to take care of existing threat perceptions. As earlier reported by TOI, DRDO has also done some work on developing “manoeuvring warheads or intelligent re-entry vehicles“ to defeat enemy ballistic missile defence systems, as well as MIRVs (multiple independently targetable reentry vehicles) for the Agni missiles. An MIRV payload basically means a single missile is capable of carrying several nuclear warheads, each programmed to hit different targets.