The 9 O'clock News: The biggest stories (Apr 4, 2012)

INS Chakra - the nuclear-propelled hunter killer submarine - formally joined the Indian Navy today. "The INS Chakra will increase our flexibility and capability immensely," Chief of Naval Staff, Admiral Nirmal Verma, said. The INS Chakra reached the Indian Shores on March 31 after completing a 40-day journey surfacing only a few times to relay back its position to the Naval Headquarters in New Delhi. For company, it had INS Ranjit sailing along with it.