As nations such as Iraq, Iran, Libya and North Korea allegedly stockpile chemical and biological weapons, the threat of the use of such weapons against the United States is becoming more of a real possibility. The use of chemical-biological weapons is a recent phenomenon.
Ballistic missiles are the ideal vehicle for delivering chemical- biological agents.
In older systems deployed in many less technically advanced threat countries, it is estimated the munitions will probably destroy 99 percent of an agent payload due to the pressure needed to break open the casings of these munitions at the point of detonation. Most threat countries do not possess weapons capable of such precision. Most have no color. All nerve agents will penetrate clothing and skin. Threat nations are more likely to use nuclear, not chemical- biological, weapons.