Fire up your popup blockers and check out these eeerie images of airplane graveyards over here...

Outside Tuscon, Arizona in the Sonora Desert is AMARC, the Aerospace Maintenance and Regeneration Center. Here the U.S. Air Force mothballs planes until they either need them again or it's time to salvage them for parts. Whenever the U.S. sells surplus planes to foreign governments part of the sales pitch is that there will always have a ready supply of spare parts. Some are turned into pilotless drones and used for missile target practice.

There are about 4,000 planes in storage, most now from the Vietnam era. Apparently in the 60's there were still planes from World War II there.

More info over at http://www.modern-ruins.com/boneyard/index.html