An Al-Qaida operative in Yemen threatened the United States and said "we are carrying a bomb" in a video posted online four days before the botched Christmas Day attempt to blow up a Northwest Airlines flight.
The video does not contain any clear evidence that the speaker was anticipating Friday's attempt, but it has attracted scrutiny because of reports that the bombing plot may have originated in Yemen.
The 23-year-old Nigerian man accused in the attack claimed he received training and instructions from al-Qaida operatives there, U.S. law enforcement officials said, and a key American lawmaker has said there are "strong suggestions" of a Yemen connection.
