How Real a Threat: Bio-terrorists Infecting Millions

I watched a TV movie, Covert One, yesterday about terrorists infected with a Ebola-like virus attacking America. But this time without detection. Likely? Possible? We know that al Qaeda has thought about using a wide variety of chemical and biological weapons. If you think its farfetched just keep in mind, we still don't know for a fact who was behind the Anthrax attack in 2001. And then there is possibility that the Iraqis were behind the West Nile epidemic that still kills Americans each year. Sounds crazy? I'm not so sure. Are you? Lets hope our government is -- sure, that is.