BRIEF TIMELINE

UNITED AIRLINES 175 TAKES OFF FROM BOSTON TO LOS ANGELES

FLIGHT ATTENDANTS ON FLIGHT 11 ALERT AUTHORITIES THE PLANE IS HIJACKED

HIJACKER MOHAMMAD ATTA ACCIDENTALLY CONTACT GROUND TOWER

UNITED AIRLINES 93 LEAVES FROM NEWARK TO SAN FRANSICO

FLIGHT 11 CRASHES INTO THE FIRST TOWER

PRESIDENT BUSH IS ALERTED OF ATTACK

PORT AUTHORITY BEGINS EVACUATING PEOPLE.

FLIGHT 175 HITS THE SECOND TOWER

THE FAA BANS FLIGHTS NEAR NEW YORK CITY

THE FAA ALERTS NEADS ABOUT FLIGHT 77

ALL FLIGHTS ARE GROUNDED AND SENT TO CANADA

MANY GOVERNMENT BUILDINGS ARE EVACUATED

THE SECOND TOWER COLLAPSES

FLIGHT 93 CRASHES IN FIELD AFTER PASSENGERS OVERTHROW HIJACKERS

MAYOR GIULIANI ORDERS EVACUATION OF LOWER MANHATTAN

PRESIDENT BUSH ANNOUNCES MILITARY BASES ARE ON HIGH ALERT

US NAVY SEND DESTROYERS TO NEW YORK CITY

THE SEVEN WORLD TRADE CENTER COLLAPSE AFTER BEING EVACUATED

PRESIDENT BUSH RETURNS TO THE WHITE HOUSE