A bill to amend title 10, United States Code, to authorize certain additional assistance to be provided by the Department of Defense for civilian law enforcement purposes related to border protection.

Amends Federal armed forces provisions to authorize the Secretary of Defense, upon request of the head of the Federal law enforcement agency concerned, to assign personnel of the Department of Defense to assist that agency in law enforcement activities relating to: (1) illegal immigration into the United States; (2) smuggling of illegal drugs into the United States; and (3) terrorist activities inside the United States.

Authorizes such personnel assistance to be provided by the Secretary only during a period during which the President has made a written certification to the Congress justifying such assistance on the basis of the national interest.

Outlines the scope of assistance authorized, including: (1) direct participation in the interdiction of vessels and aircraft; and (2) arrests, searches, seizures, and other similar activities.