This book focuses on the non-tanker variants built by Boeing. It will look at a host of variants, including the C-135, EC-135, NC-135, OC-135, RC-135, TC-135, VC-135 and WC-135. The role, operating command and detailed history will be provided. With over 170 images, this book is the second of two volumes dealing with Seattle's veteran Stratotankers.