The ignorance is strong on ihub. I have been a crew chief (mechanic) on KC-135 Stratotankers for the past 5 years. These are built on the Boeing 707 models and yes they have been "barrel rolled" by a crazy pilot named tex. this is how he basically sold the plane to initial investors. The newest (youngest) model in the Air Force inventory is a 1963. Do the math. They plan on flying these until 2020 at least. While the planes tail number and frame is decades old. I can assure you that 95% of the components are fairly new. They're argument against an aging plane has no logical position if you understood aerospace maintenance in the slightest. We're still the only plane capable of flying slow enough to refuel A-10's and fast enough to refuel the SR-71 when she still protected this great country. Nobody Kicks Ass Without Tanker Gas.