Cancer at Ground Zero

So there is a show on television right now exploring connections between people who were at Ground Zero during the disaster and are now showing signs of cancer. Why do terrible things just have to get more terrible...?

It's years later it's time for things to get better. So speaking of years later, I have a questions (don't peek ahead) for you to think about. What year did the towers fall on September 11th?

The answer is 2001. Which may seem obvious (if you know it) but they just did a survey and a large number of people got the wrong answer. (I'll look it up and post it later.)