ive finished the book. Phenominal ending. I was surprised to find this out though. The book is real.
Robert Langdon and stuff like that isnt. I mean, anti-matter, planes that go mach 15, ect. . .
There really was a group of people called the Illuminati. The plane that goes mach 15(over 10,000 mph)and flyes 100 miles high is called the X-33. Its fast enough to get you from New York to Tokyo in one hour.
There's another called the X-34:

(this is the one Robert Langdon rides in the book)
This one kinda scares me: AnitMatter is acctually being produced. At CERN by the way which is, like it says in the book, in Switzerland. If you've not read the book then let me fill you in a bit about this stuff. Anti-matter is highly unstable and combustable. One droplet of anti-matter has the explosive power of a ten kiloton bomb(just think what could happen if a terrorist got ahold of this stuff? D DAY). It will explode when it comes in contact with ANYTHING. Even air. See since its 'anti-matter' it will explode on contact with matter. Which is everything on earth. They are produced like this: anti-particles are accelerated around a 27-mile-long circular tunnel, at the speed of light. Fast enough to complete the tunnel 11,000 times a second. If you want more specifics just search antimatter on a search engine.
Another little interesting fact about anti-matter, on 'Star Trek' the USS Enterprise was fueled by anti-matter.