The technology required to deploy Directed Energy Weapons (DEW) for use against hardened military targets may be constrained to just a few nations, but for soft targets like commercial aircraft and Air Transportation System (ATS) assets options are plenty for terrorists, organized crime or rogue states hoping to inflict harm. These devices are readily configured for covert operations favored by such groups. This work will identify, quantify and provide guidance to intercept RF, EMP and HPM weapons terrorists might deploy against the ATS. Designs within this group will be categorized by type of design, quantitatively analyzed to determine threat parameters and broken down into components that can be screened by ATS personnel. The end product of this work will directly improve the safety and security of the ATS.