An ominous new threat against the U.S. appears on a Web site and claims to be from an Al Qaeda spokesman.

It says the U.S. has killed thousands of people in Iraq, the Palestinian territories, Afghanistan, and other places.

And so, it reads: "We have the right to kill four million Americans, including one million children," and it says, "we have the right to fight them by chemical and biological weapons so they catch the fatal and unusual diseases Muslims have caught due to U.S. chemical and biological weapons."