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What is the Department of Homeland Security?

 

After the Sept. 11, 2001, attacks, 22 existing federal departments and agencies were integrated into the Department of Homeland Security, with a stated mission of preventing terrorism and protecting Americans from various threats. The Cabinet-level department handles a broad range of duties related to public security, including immigration, border security, anti-terrorism, cyber-security and other domestic emergencies. As of 2016, it had a budget of $41 billion as of 2016 and more than 240,000 employees.