That is definately fake. All websites (including Boeing's) don't show any AA 777 deliveries till 1/99. Look at the reflection on the top of the fuse, there are clouds on it, but no clouds in the sky! I have seen some programs that create aircraft and put them on a background that look real (Ames Research center I think).
BTW, check out Lawerance Feir's pics. Most are fake, of real aircraft, but not real backgrounds. They are really nice.