At the time of this publication, more than 250 people have been killed in the United States during what has been classified as active shooter and mass casualty incidents (AS/MCIs) since the Columbine High School shootings in 1999. AS/MCIs involve one or more suspects who participate in an ongoing, random or systematic shooting spree, demonstrating the intent to harm others with the objective of mass murder.  
 
It has become evident that these events may take place in any community impacting fire and police departments, regardless of their size or capacity. Local jurisdictions must build sufficient public safety resources to handle AS/MCI scenarios. Local fire/Emergency Medical Services (EMS) and law enforcement (LE) must have common tactics, communications capabilities and terminology to have seamless, effective operations. They should also establish standard operating procedures (SOPs) for these very volatile and dangerous situations.  The goal is to plan, prepare and respond in a manner that will save the maximum number of lives possible.