Al Qaeda leaders, long known to covet biological and chemical weapons, have reached at least the threshold of production and may already have manufactured some of them, according to a newly obtained cache of documentary evidence and interrogations recently conducted by the U.S. government.
The U.S. has received a credible report that Islamic extremists affiliated with al Qaeda took possession of a chemical weapon, possibly the nerve agent VX, in Iraq last month or late in October.
A U.S. intelligence review has concluded that four nations -- including Iraq and North Korea -- possess covert stocks of the smallpox pathogen.
Unsettling signs of al Qaeda's aims and skills in cyberspace have led some government experts to conclude that terrorists are at the threshold of using the Internet as a direct instrument of bloodshed. The new threat bears little resemblance to familiar financial disruptions by hackers responsible for viruses and worms. It comes instead at the meeting points of computers and the physical structures they control.
Alarmed by growing hints of al Qaeda's progress toward obtaining a nuclear or radiological weapon, the Bush administration has deployed hundreds of sophisticated sensors since November to U.S. borders, overseas facilities and choke points around Washington. It has placed the Delta Force, the nation's elite commando unit, on a new standby alert to seize control of nuclear materials that the sensors may detect.