'' Millennium '' was docked in Athens , Greece , on September 11 , 2001 , and went into high-security lock-down upon receipt of news regarding the September 11 attacks in the USA . A Celebrity Cruises-sponsored marketing event onboard was in progress but it was curtailed and everyone except passengers and crew were removed from the ship . All other passenger activities except food service were cancelled . The following day , while at sea , a small private plane began to circle the ship , causing panic among several passengers on deck . The plane eventually flew away
September 11 attacks
September 11 attacks
Celebrity Millennium