National security refers to the protection of a nation's citizens, territory, and interests from threats and dangers. This includes safeguarding against military attacks, terrorism, and espionage. Governments often create policies and strategies to ensure the safety and well-being of their people, which can involve law enforcement, intelligence agencies, and military forces. In addition to physical threats, national security also encompasses economic stability and cybersecurity. Protecting critical infrastructure, such as power grids and communication networks, is essential for maintaining a secure environment. By addressing these various aspects, nations work to create a safe and stable society for their citizens.