I have some knowledge of nuclear weapons. While a high-yield nuclear weapon yields high psychological (and the most destructive) impact, the development of high-yield weapons is a financial exercise requiring outrageous amounts of money, technical expertise, fissile material and time... All of these aspects are required, to develop even one nuclear warhead. Now, considering the enormous investment of resources required, even a bone-head like Saddam Hussein would never entrust someone else to deliver such a weapon within striking-range of the US (much less to a major U.S. city) because the probabilities of being caught with such a weapon are exceedingly high. Such a weapons program attracts a lot of attention, because certain materials- namely the Uranium or Plutonium needed to complete the bomb- are closely monitored world-wide. If non-enriched uranium was obtained, it would take billions of dollars to enrich it to a useful enrichment level to make even a moderately powerful bomb. Again, such efforts attract a great deal of attention. And finally, if such a weapon were developed from stolen uranium or plutonium, it's not terribly difficult to trace (from residue) the origin of the uranium- a very important clue for finding the perpetrator. All in all, an expensive, risky proposition, with a high probability of being caught.
Biological weapons, on the other hand, are more effective from a psychological standpoint- a victim could be contaminated, and spread the wealth to many others before they finally expire from the contamination... Such weapons are cheap and easily made. More, their development is relatively easy to hide. If a good dispersal agent can be used...? Then their "bang for the buck," if you'll excuse the pun, is far greater than a nuke, without the inherent risks of detection...
Consider, for example, a biological weapon could conceivably be inside a bottle of gatorade, taken onboard a plane as carry-on luggage, and flown to a major city without so much as a second glance by security... Drop it into a water-supply, or ventilation system of a skyscraper...? And you won't know what happened until after some of the victims have died...
That is the scary thing...
Knowing what I do know about nuclear weapons, it was never a real concern... The real thing that worried me (and still does) is the biological... Because for this, there's no protection... Except to kill the bad guys on their own turf.
Be well...
Try telling that to Chrissy Matthews and he tells you that you're wrong .. He's been doing that to all his republican guest for the past week
Thanks for the ping Howlin