Authors: Tom Knuth, MD, MPH, FACS, COL, Medical Corps, US Army, Chief, Combat Casualty Care Integrated Concepts Team, Directorate of Combat Doctrine and Development, Army Medical Department Center and School, Fort Sam Houston, Texas; Peter B. Letarte, MD, FACS, Neurosurgeon, Hines VA Medical Center, Loyola University Medical Center; Geoffrey Ling, MD, PhD, LTC, Medical Corps, US Army, Professor and Vice-Chair of Neurology, Director of Critical Care Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland; Leon E. Moores, MD, FACS, LTC, Medical Corps, US Army, Assistant Professor of Surgery and Pediatrics, Uniformed Services University of the Health Sciences, Chief of Neurosurgery, Director of Pediatric Neurological Surgery, Walter Reed Army Medical Center; Peter Rhee, MD, MPH, FACS, FCCM, CAPT, Medical Corps, US Navy, Professor of Surgery/Molecular Cellular Biology, Director, Navy Trauma Training Center, Los Angeles County Medical Center, University of Southern California; David Tauber, CCEMT-P, NREMT-P, I\C, Executive Director, Advanced Life Support Institute (New Hampshire) Medical Specialist/Hazardous Materials Technician, FEMA USAR Team MA1; Art Trask, MD, FACS, INOVA Regional Trauma Center, INOVA Fairfax Hospital