US DHS
The US Department of Homeland Security (DHS) was established in 2002 in response to the terrorist attacks of September 11, 2001. The agency's mission is to protect the United States from threats to its security, including terrorism, cyber attacks, and natural disasters. DHS is responsible for a wide range of activities, including border security, airport security, port security, and the protection of critical infrastructure such as power grids and transportation systems. The agency also plays a key role in responding to natural disasters and other emergencies, and works closely with state and local governments to ensure that they are prepared to respond to such events. DHS is headquartered in Washington, D.C., and employs more than 240,000 people across the country.