Here is what I've read:
U.S. officials by the end of last week were telling holiday travelers to be vigilant about the threat of terrorist attacks. The warning was prompted in part by a raised level of ominous intercepted communications that has not quieted for months.
The significance of the sustained level of intelligence chatter is unclear, the officials said.
Homeland Security officials said they did not expect a change in the threat level unless more specific intelligence was received.
On Friday, the Arabic television network Al-Jazeera broadcast a new statement from Ayman al-Zawahri, the chief deputy of Osama bin Laden. The CIA said Saturday it believes the tape is authentic.
We are still chasing the Americans and their allies everywhere, even in their homeland, according to the voice on the tape.
Some statements from al-Qaida leaders are later regarded as preludes to attacks; others simply propaganda.
Gen. Richard Myers, chairman of the Joint Chiefs of Staff, said Sunday morning that officials were trying to determine whether increased terrorist chatter being detected in recent weeks was an aberration or something more serious.
There is no doubt, from all the intelligence we pick up from al-Qaida, that they want to do away with our way of life, he told Fox News Sunday.