One of the most dangerous challenges facing police officers today is responding to threats to homeland security—in particular, responding to threats dealing with explosives and explosive materials. As evidenced by the tragic events that took place this July in Aurora, Colorado, the threat is ever present. One resource that police officers can utilize prior to encountering critical incidents and hazards in the field is the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) National Center for Explosives Training and Research (NCETR) in Huntsville, Alabama.