why was the department of homeland security created?

The Department of Homeland Security (DHS) was created primarily in response to the terrorist attacks of September 11, 2001. Its creation addressed the significant concern about the lack of coordination and intelligence sharing among various government agencies regarding national security. The Homeland Security Act of 2002 established DHS as an executive department to unify more than 100 agencies involved in homeland security into one department with the main mission to protect the United States from terrorist threats and attacks, and to respond to natural disasters and other emergencies more effectively. The DHS began operations in 2003 to enhance the country's ability to prevent, protect against, and respond to threats, filling a gap where no single agency had homeland security as its primary mission before its establishment.