Terrorism

There are always cause and investigation.

Terrorism is not something like a natural disaster, it is a manmade thing.

Precisely, it is someone's business.

Some people pay for terrorism to reach their goals. No more, no less.

Is it a good thing? Depends on the point of view. For commoners, like most of the people, it is obviously a bad thing.

For rich people it just like chess or something like that.