PayJ567 said:
Dirty Bomb FTW, could destroy anything in the most awesome and pathetic way possible.
Except the immediate destructive potential of a dirty bomb is underwhelming at best. The weapon concept is only feared because the conventional explosion would distribute radioactive dust across a wide area and while this issue can generally be resolved it has the potential to cause severe long term health problems across a surprisingly wide area. Generally, when people discuss a WMD in anything other than a fearmongering capacity, they wouldn't bother mentioning a dirty bomb.
Nuclear weapons are classified WMD for the obvious reason that they offer the umparalled ability to project firepower on a location. Chemical weapons are so classified because modern chemical agents are lethal enough that one can get a few hundred thousand doses in a single gallon sized container. This itself isn't terribly notable until one has an efficient method for dispersal. Because of it's nature, chemical weapons are generally less of a threat on a per weapon basis than nuclear weapons. Biological weapons are the most difficult of all to employ given the high likelyhood of infection of friendly population centers (people do a lot of traveling these days). If you combine the variable lethality rate and commmunicability you end up with a weapon of utter last resort. You can't control it's release, it can potentially be contained and the long term impact on the species as a whole are unknown.
Each of the three major systems are so classified because they have the capacity to kill a staggering number of people with single deployments. Dirty bombs, though more dangerous that a conventional bomb, simply cannot be said to be anywhere near the league of even a small nuclear weapon, a single VX rocket or a paultry vial of weaponized smallpox.
darkless said:
Thermobaric bombs all the way.
Just a quick comparison. Largest Thermobaric weapon in existance: 11 tonnes TNT equivalent. Blast at Hiroshima: 25,000 tonnes TNT equivalent.
Sorry kiddo, that's just not going to cut it.