The book deals with 21 crore issues of national security, which are inter-connected and inter-woven with equal vitality. In today's environment of voilent happenings all over the world, explosive law and order situation in the various states of the nation due to externally aided terrorism by India's adversaries, the aspects of national security gain much more relevance. Further complexities have been added by internal conflicts, environmental degradation due to man-made and natural disastors. The citizens have to rise and share their responsibility in understanding national security aspects and inculcating security consiousness.