"We bring the good news to Muslims of the world that the expected 'Winds of Black Death' strike against America is now in its final stage ... 90 percent (ready) and God willing near," the letter said.
The letter, signed by the Abu Hafs al-Masri Brigades, which said it is part of al Qaeda, was sent to the London-based al-Quds al-Arabi newspaper. A copy of the letter was faxed to Reuters in Dubai.
What could the Winds of Black Death be? Bio Terror? Dirty Bomb? Blowing up a Volcano?