Martial arts star Chuck Norris dies at 86
Known for his roles in action films and TV series
Became an internet meme symbolizing toughness
Briefing: Chuck Norris, martial arts master and actor whose toughness became internet lore, dies at 86
Strategic angle: Norris karate chopped and kickboxed his way through more than a dozen action films, before leaping to TV in Walker, Texas Ranger.