This is one of the strongest-worded warnings yet, with very specific references to Al-Qaeda and what they plan to do. Most unusual.

WORLDWIDE CAUTION
November 24, 2003

This supersedes the Worldwide Caution dated September 26, 2003. It is being issued to re-emphasize the continuing threat that U.S. citizens may be a target of terrorist actions. This Worldwide Caution expires on April 21, 2004. The U.S. Government remains deeply concerned about the security of U.S. citizens overseas. U.S. citizens are cautioned to maintain a high level of vigilance, to remain alert and to take appropriate steps to increase their security awareness. We are seeing increasing indications that Al-Qaida is preparing to strike U.S. interests abroad. Al-Qaida and its associated organizations have struck in the Middle East in Riyadh, Saudi Arabia and in Europe in Istanbul, Turkey. We therefore assess that other geographic locations could be venues for the next round of attacks. We expect Al-Qaida will strive for new attacks designed to be more devastating than the September 11 attack, possibly nvolving nonconventional weapons such as chemical or biological agents. We also cannot rule out that Al-Qaida will attempt a second catastrophic attack within the U.S.

Unfortunately, they put out a lot of these since 911, and to many they”ve become the boy who cried wolf.