National security refers to the protection, preservation and promotion of a nation’s national interest against internal and external threats and challenges. Maintenance of our National security is critical as it provides us the necessary freedom, and removes all fear and hindrances in our pursuit of prosperity and happiness. National security not only entails military security but also influences our Politico-diplomatic structures, water, economy, energy, food, health, education, technology, Cyber, Space, nuclear deterrence and environment.