How about getting him the book "Family Of Secrets"? If you haven't read it, you should buy a copy yourself and then have him read it after you do. It's hard to imagine it wouldn't open up his eyes.
Also, has he seen "Explosive Evidence" - the PBS documentary about the findings of Architects and Engineers for 9/11 Truth?
Also, does he know about "Operation Northwoods"?
Content of posts and comments on the Daily Paul represent the opinions of the original posters, and are not endo