The [[Homeland Security Act of 2002]] authorized the establishment of the [[Department of Homeland Security]], which, on March 1, 2003, assumed management of the [[United States Coast Guard]] and the [[Transportation Security Administration]], formerly DOT Operating Administrations. The Department of Transportation was established by an act of Congress on October 15, 1966; the Department’s first official day of operation was April 1, 1967. | The [[Homeland Security Act of 2002]] authorized the establishment of the [[Department of Homeland Security]], which, on March 1, 2003, assumed management of the [[United States Coast Guard]] and the [[Transportation Security Administration]], formerly DOT Operating Administrations. The Department of Transportation was established by an act of Congress on October 15, 1966; the Department’s first official day of operation was April 1, 1967. |