Production. Shell loading. Nonchalantly loading a two-ton "block buster" at a large Midwest plant. Every precaution is taken, but a certain stoicism is required for this job. The workmen fill each end of the bomb with TNT, delivered "hot," and the remaining spaces with amatol, a mixture of fifty percent ammonium hydrate and fifty percent TNT. Ravenna ordnance plant. Sourced from the Library of Congress.
View public domain image source here