This is the stuff conspiracy theorists live on, but for once there seems to be something resembling proof:
Leaked Video: Department of Defense Discusses Eliminating Religious Fundamentalism Through Gene-Targeting Vaccine
Even this title sounds a bit crazy, but let me explain. If you follow that link (which I recommend you do), you can find a video of a presentation at the Defense Department from 2005. The presenter is giving a Powerpoint presentation of sorts that details how a vaccine could be developed to work on religious parts of the brain, highlighting brain scans to show the science, describing common vaccines they could be subtly coupled with, and discussing the implications this could have if used on Islamic extremists.
This video was leaked by someone participating in the #AntiSec campaign spearheaded by Anonymous and LulzSec. If someone simply said this was happening, I would normally write it off as something for the Alex Jones crowd, but as far as I can tell, this video is legit. I've also worked professionally in film-editing and can assure you that this is not misleadingly edited. Anyhoo, what do?