Rapists in Kenya, and most places everywhere in the world, like to target vulnerable people, especially young girls. But there's a local problem in Kenya: HIV.

So rapists in Kenya started to target older women because they are generally believed to be virus-free. Mostly because many of them are sexually inactive.

If the rapists thought they were going to have their way, they were wrong. Women, elderly women, are fighting back.

Enter, the Martial art grandmas of Kenya.

This is Jane, and she lives in Korogocho, one of the largest slums in Nairobi, the capital of Kenya. She's 55, but she's still kicking ass. In fact, she already thought an attacker a lesson, or three. She says:

"He touched my neck. I gave him a punch, and another one, and another one."

Jane trains with 20 other women with the oldest woman in her squad being over 80 years old.