This book focuses on the KC-135 tanker built by Boeing. It will look at every model of the KC-135 built and its introduction into service. There are several other specialised types that performed a non-aerial refuelling task, such as Airborne Command Post, but which retained the KC-135A designation for some years. The ground trainers will also be covered in this book. With over 170 images, this book is the first of two volumes dealing with Seattle's veteran Stratotankers.