Sarin gas attack on the Tokyo subway

A very bad man wanted to hurt a lot of people who were riding the trains in Tokyo. So, he made a kind of gas that could hurt people if they breathed it in. He put this gas in some bags and placed them in the subway trains. When some people opened the bags, the gas came out and made them feel very sick. They had trouble breathing, their eyes got watery, and they felt really dizzy. Lots of people got hurt and some even died. The police found out who did it and arrested him, but it was a very scary and sad thing that happened to a lot of people.