This is one of those non-workables.
Identify the older gentleman, who has left behind him a legacy of contact combat that started with fighting the Nazis and ended up being used by all across the world, especially in urban self-defence.
Happy quizzing, and have a nice life, folks!
Five answers, and all correct! This is Imre Lichtenfeld, aka Imi Sde-Or, the creator of the martial art Krav Maga.