![Karate kids train at the Jack and Jill School. (By Jjskarate, cropped and color enhanced by Zanaq (File:JJS_Karate_Kids_on_Training.jpg) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons](https://www.lizaketchum.org/blog/wp-content/uploads/2015/02/256px-JJS_Karate_Kids_on_Training_-_crop-1.jpg)
Karate kids train at the Jack and Jill School. By Jjskarate, cropped and color enhanced by Zanaq (File:JJS_Karate_Kids_on_Training.jpg) [CC BY 3.0 (http://creativecommons.org/licenses/by/3.0)], via Wikimedia Commons
A new kid in town faces down a bully by announcing he’s earned a black belt in karate. How popular have the martial arts become for self-defense?