Steven, terrorist could easily use biological weapons. They already have. Remember the anthrax letters?

There are already quite a few diseases that would probably fit the bill, smallpox being one of them.

You don't need multiple millions of dollars or a fancy genetics lab to make a weapon that uses anthrax.

But that wasn't your original question. Your question was could they genetically engineer a "doomsday bug". Now that is quite a different proposition altogether.

I recall the use of Sarin on Japanese subway as the most significant terrorist use of bio-toxins.

Sure Terrorists already use Bio-weapons, often less effectively than they use explosives.

The important issue to focus on with terrorists, be they religious minded fundamentalists or the sort of scum of Bader-Mienhoff or the Italian Red brigades, is as dearest Margaret said

"All attempts to destroy democracy by terrorism will fail. It must be business as usual. "