Declaration of national emergency by reason of certain terrorist attacks : message from the President of the United States transmitting his declaration of a national emergency by reason of the terrorist attacks at the World Trade Center, New York, New York, and the Pentagon, and the continuing and immediate threat of further attacks on the United States and his executive order to order the ready reserve of the Armed forces to active duty and delegating certain authorities to the secretaries of defense and transportation, pursuant to 50 U.S.C. 1621(a).