Ok well after Ms. High-and-mighty gave her answer she went and looked into it. Here is what I found:
X-ray's don't harm cameras. They harm film. So if your camera is loaded with film - and it should be - your concern should be for the film in it, not for the camera itself.
Will airport X-rays harm your film? Yes, they can...but you usually don't have to worry, according to NYI. Here's why. The X-ray machines in all American airports and most overseas international airports will not harm your film, provided your film is X-rayed just once or twice. So if you're flying to Disneyland or Hawaii or London and back, your film should not be harmed by the airport X-ray machines.
A problem arises, however, if your film is X-rayed more than a couple of times. X-rays are cumulative. The second dose adds to the first. The third to the second. And so on. Eventually, your film will be harmed by the accumulation of X-rays. So if you're going on a multi-leg trip, beware. Insist that your camera and film be hand-inspected on each leg of your journey. Security personnel are required to heed your request in the U.S., and the inconvenience is minor.