The Department of Homeland Security combined 22 different federal departments and agencies into a unified, integrated cabinet agency when it was established in 2002.
A summary of historical laws and regulations constructing and modifying the existing Department of Homeland Security.
DHS seal was created in 2003 to symbolize the Department's mission of preventing attacks and protecting Americans on land, sea and air.
- Chronology of Homeland Security Advisory System from implementation until replaced by National Terrorism Advisory System.
The former Secretaries of the Department of Homeland Security.
DHS was created through the integration of all or part of 22 different federal departments and agencies into a unified Department.
The Secretary of Homeland Security portraits are a tribute to the Secretaries' service to the Department and the nation.