Raz Chen is an expert in Krav Maga, teaching in New York City, with multiple certifications from the Sports Academy in Israel, and Wingate Institute. A former special operations infantry combatant and Senior military Krav Maga instructor, Raz taught over 10,000 soldiers, including top special forces counter-terrorism and US Marines. He currently teaches classes and seminars for the army, police, and civilians on topics like counter-terrorism, rape prevention, Krav Maga instructor certification, Krav Maga combat, and fitness. He is the creator of AVIIR, a company dedicated to functional training, protection, regeneration, and longevity. Credit and gratitude to his co-writer and senior student Elke Weiss, whose research, writing, and editing are instrumental to this column and all my other writings.