In this answer there is:
As for how much of the fuselage is taken up by fuel tanks, you can look at cutaways of the [KC-135][3] and [KC-10][4] (unfortunately the captions for the KC-10 are in a foreign language, as I could not find a high-enough resolution one in English)
Should these images be inline the answer (i.e. shown as images not hyperlinks) -- or more importantly, at least copied to and hosted on SE's imgur?