Stanton Friedman has posted a very thorough and exhaustive critique of a recent National Geographic documentary which seemingly attempted to debunk the happenings of Roswell. As he puts it they "abided by the 4 basic rules of debunkdom":

1. Don’t bother me with the facts, my mind is made up.

2. What the public doesn’t know, I won’t tell them.

3. If you can’t attack the data, attack the people.

4. Do your research by proclamation, no investigation is required.

I never saw the National Geographic documentary on Roswell, and I certainly won't waste my time with it after reading this.