In an era where active shooter incidents and complex coordinated terror attacks continue to challenge our communities, Active Shooter-Hostile Event Response (ASHER) offers a definitive framework for a unified response. Drawing from decades of military and law enforcement experience, Scott M. Hyderkhan presents a holistic system that transforms how organizations can prepare for, and respond to, active shooter events. As hostile events and attacks become more frequent, sophisticated, coordinated, and complex in nature, unique planning considerations are required to adequately respond in kind. The book discusses coordination among responders, including the joint operations of fire and police and the need for situational and operational awareness. Coverage also includes other logistical factors such as evacuation operations, as well as medical triage and coordination with local and regional hospitals. Drawing on past and recent experiences, the book presents best practices to be enable organisations to plan, train, and exercise to protect lives - secure in the knowledge that responding agencies will effectively carry out their predetermined roles upon arriving at the scene. Active Shooter-Hostile Event Response (ASHER) will be of interest to business leaders, security personnel and directors, risk managers, community leaders, police, SWAT teams, and other emergency and first responder agencies.