||A bomb constructed and deployed in ways other than in conventional military action; improvised explosive device (IED). IEDs are explosive devices of varying sizes, operating and delivery methods; and consist of almost any type of explosive and initiator. They are designed to cause death or injury by using explosives alone or in combination with toxic <<CHEMICAL_AGENT_TYPE>>, <<BIOLOGICAL_AGENT_TYPE>>, or <<RADIOLOGICAL_AGENT_TYPE>> <MATERIAL>.
Each is relatively unique in nature because the creator must improvise using the <MATERIAL>s at hand. And, although unique in nature, IEDs fall into three categories - package, vehicle-borne, and suicide bombs.