What crime has Bill committed by placing a pipe bomb outside IWW headquarters?

The act of placing a pipe bomb outside the Industrial Workers of the World (IWW) headquarters constitutes a serious crime primarily associated with the use of explosives. In this context, arson is defined as the willful and malicious burning or exploding of property, which can include the use of explosives. By placing a bomb, Bill is not just endangering the building and its occupants, but he is also using an explosive device that could potentially cause significant destruction and harm.

This type of activity generally aims to intimidate, destroy property, or provoke panic, aligning with the characteristics of arson, especially if it leads to a fire or an explosion. The intention behind using a pipe bomb is crucial, as it indicates a deliberate attempt to cause damage or instill fear.

On the other hand, burglary, felony vandalism, and assault do not accurately capture the nature of Bill's actions. Burglary involves illegally entering a structure with the intent to commit a crime inside, while felony vandalism would refer to destroying property without the specific implication of using explosives. Assault typically refers to causing physical harm or attempting to cause harm to a person, which isn't directly relevant to the act of planting a bomb in this particular scenario.