It was raised from yellow, signifying caution, to orange, the second highest among the five levels of national terrorism warnings.

Other official terrorism warnings issued without raising the threat level above Elevated:

The government's terrorism warnings are more subtle.

Why would the White House, which has just issued another generalized terrorism warning, want to temporize on mounting an American response?

Naturally, her terrorism warning goes unheeded, and the result is Sept. 11.

That summer he wrote an article on terrorism warning that government agencies needed to cooperate.

Did the Bush administration ignore terrorism warnings before 9/11?

The department released what it called a "worldwide terrorism warning," advising Americans to stay away from "large gatherings and celebrations" throughout the world.

Trying to make sense of the terrorism warnings is a tough slog.

The silence was interrupted occasionally as we vented about the new terrorism warnings that were issued every time the president's ratings were slipping.