Can u check the Agni Misile system, particularly the third version which is a ICBM
http://www.bharat-rakshak.com/MISSILES/Agni.html
Each weapon system has its own utilisation and please do not mess up with just what u read hear and there on the Internet. If you are a Defence Analyst then u may understand the significance. There is a specific Degree program where you can understand these things...! Its a good career oppurtunity as well.
Guys can contact.... Dr. L. Baktha Lawrance Godwin Department of Defence & Strategic Studies Voorhees College, Vellore - 632 001
The Commandant / Representative Defence Service Staff College Wellington Nilgiris - 643 231
Thiru S.V. Raghavan S.G. Lecturer & Head Department of Defence & Strategic Studies Gurunanak College Chennai - 600 042
Dr. R.N. Swaroop Professor & Head Department of Defence & Strategic Studies University of Madras Chennai - 600 005
Dr. V.K. Padmanabhan Professor Dept. of South and South East Asian Studies University of Madras Chennai - 600 005
The Commandant / Representative National Defence College New Delhi