Prime Minister Manmohan Singh today hailed the test firing of Inter Continental Ballistic Missile Agni V saying that this represented another milestone in India's quest to add to the credibility of its security and preparedness. Soon after the launch of Agni V, he congratulated the scientists who had worked tirelessly and called up DRDO chief V K Saraswat in this regard. "Today's successful Agni V test launch represents another milestone in our quest to add to the credibility of our security and preparedness and to continuously explore the frontiers of science," he added. "I congratulate all the scientific and technical personnel of the DRDO and other organisations who have worked tirelessly in our endeavour to strengthen the defence and security of our country," the Prime Minister said in his message. The nation stands together in honouring the scientific community, the Prime Minister said.