A 16-year veteran of the United States Navy, Mark served in Naval Special Warfare as a Special Warfare Combatant Craft Operator, where he served with honor on numerous special warfare missions acro...ver másA 16-year veteran of the United States Navy, Mark served in Naval Special Warfare as a Special Warfare Combatant Craft Operator, where he served with honor on numerous special warfare missions across the globe. Mark had suffered a couple life-threatening injuries while serving in Naval Special Warfare and was medically discharged Honorably in 2006, as a disabled veteran. Mark has taught firearms, tactics and personal and safety awareness courses to over 100,000 students since 2006, varying from military service members, federal/state/local law enforcement and SWAT members, to civilians. Mark is determined to publish books that help society and those willing to learn different defensive skills.ver menos