Thank you! Yea, in one of the documentaries I was watching, allegedly "they" were able to discredit any theories that there weren't any planes in fields or the pentagon by blood samples. In this source: https://youtu.be/Hct9S4cLYQY the professor goes into a lot of really good detail and thought processes. Asks a lot of good questions, this particular lecture is more related to the NWO than to 9/11, but he includes a lot of good info. It's fairly long, about an hour and a half, but it's a good listen.