Taekwondo masters training with Dk Yoo

DK Yoo is a South Korean martial artist master known for his videos of Systema style. 

this is a seminar with Taekwondo masters, this part is about fast reaction.DK Yoo was born in  Toronto, Ontario. Yoo has practiced over 15 martials arts:

Boxing

Savate

Taichi

Aikido

Sanda

Wu Shu

Shaolin Kung Fu

Systema

Eskrima

Wing Chun

Judo

Jeet Kune Do

Kick Boxing

Myanmar Lethwei

Taekwondo

Tong Bei Quan

Taekkyeon

Baji Quan

Fencing