Title I - Department of Homeland Security
Sec. 101. Executive Department; Mission
(a) Establishment. - "There is established a Department of Homeland Security, as an executive department of the United States within the meaning of title 5, United States Code.
(1) In General. - The primary mission of the Department is to
(A) prevent terrorist attacks within the United States;
(B) reduce the vulnerability of the United States to terrorism; and
(C) minimize the damage, and assist in the recovery, from terrorist attacks that do occur within the United States."
From the Homeland Security Act of 2002
Read the entire text of the Homeland Security Act of 2002 (PDF, 187 pages - 526 KB).