Why do you think there are so many movies about 9/11; yet, a very small amount about disasters like Hurricane Katrina?

I was looking for movies the other day about Hurricane Katrina. I’m in Canada and have found nothing available to me (other than online information about a few movies). The 9/11 disaster has so many movies that I actually got tired of seeing them pop up over the years.

Is the difference because there was an “enemy” from 9/11? As it was caused by humans and not nature. Maybe the conspiracy buzz surrounding it? What about the media?

It just seems to me that there were two very different reactions to both disasters. This, in turn, could explain the incredible difference in the amount of movies made about the two events. I know more time has passed since 9/11 but it still seems really unequal.

What do you think?

Note: 9/11 meaning the Twin Towers disaster.