<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
I really enjoy the Hero Workouts in CrossFit. Every time I read who they are dedicated to it seems that they are always killed by an IED. What is that?
<|assistant|>
An IED (Improvised Explosive Device) is an explosive device created by individuals or groups for their own use, without assistance of a government or other organization. It typically consists of a small explosive device combined with metal pieces, nails, ball bearings, etc. to inflict maximum damage when activated. 
It is mostly used as a weapon in war zones, where it can be placed in an accessible area to cause casualties among passing soldiers or civilians.