Homeland security is a government initiative aimed at protecting a nation from threats and ensuring the safety of its citizens. It involves various agencies and organizations working together to prevent terrorism, respond to natural disasters, and manage emergencies. Key components include intelligence gathering, border security, and disaster preparedness. The Department of Homeland Security (DHS) is the primary agency responsible for coordinating these efforts in the United States. Established after the September 11 attacks in 2001, the DHS focuses on safeguarding critical infrastructure, enhancing cybersecurity, and promoting resilience in communities to better respond to potential threats.