By now, you may have seen the viral video of a man in the Joker costume attacking people and setting a train on fire in Tokyo. On the night of Halloween, the Joker ended up injuring as many as 17 people with a knife, and according to the local media, the suspect told authorities that he “wanted to kill people so he could be sentenced to death.” This is actually the second mass knife attack in two months. But Japan has the reputation for being one of the safest countries in the world, so how can