National Command Authority

National Command Authority (NCA) is the ultimate decision-making power for a country's nuclear and strategic military actions. It refers to the highest level of leadership—the President or the designated authority—who has the legal authority and responsibility to authorize the use of nuclear weapons in national defense. The NCA ensures that such crucial decisions are centralized, controlled, and made with appropriate oversight, preventing accidental or unauthorized use. Essentially, it is the core authority that ensures a country's most destructive capabilities are exercised only when deemed necessary by the highest level of national leadership.