If you look at Air Force One from the outside, it is physically different from a regular commerical B747-200.
Here's a link:
Does anyone know what the "hump" right above the nose is? If you look at the top of the fuselage, there are a lot more of those little "antennas." My assumption is that these are for communication, but I'm not sure. Any ideas? or does any one *know*?