What type of attack is considered the most likely WMD attack that Americans might face?

A chemical attack is considered the most likely type of weapons of mass destruction (WMD) attack that Americans might face due to several key factors. First, chemical agents are generally more accessible and easier to produce compared to nuclear and biological weapons. Many countries possess chemical stockpiles, and the materials required for their production are often dual-use chemicals, which can be legally obtained for legitimate purposes.

Additionally, chemicals can have immediate and devastating effects on civilians and military personnel alike, causing casualties and widespread panic. Attacking with chemical agents can be done in various environments, including urban settings where large populations are concentrated, further enhancing the potential for mass impact.

While nuclear and biological weapons pose significant threats, they come with greater logistical challenges and more stringent regulations which can deter their use. Cyber attacks, while destructive, do not fit the traditional definition of a WMD and typically affect information systems rather than causing physical harm through mass destruction. Thus, the profile of a chemical attack aligns closely with current threats, making it the most likely scenario facing Americans today.