Bruce Siddle is a 20-year (plus) law enforcement veteran specializing in training and survival human factors. He is the founder of PPCT Management Systems and the managing partner of Warrior Science Group. Siddle has been a consultant for hundreds of criminal justice and public safety agencies, including the U.S. Department of State’s Diplomatic Security Service, FBI’s Hostage Rescue Unit, U.S. Secret Service Counter Assault Team, the Transportation Security Agency, U.S. Armed Forces and the Queen of England’s personal protection unit. He is the author of Sharpening the Warrior’s Edge and is working on a second text, Warrior Science, The Study of Combat Human Factors. Siddle has reported receiving honoraria and/or research support, either directly or indirectly, from the sponsor of this supplement, North American Rescue.