This device was to use a total of 10 layers of semi-refined U-235/238, alternating with Neutron absorbing kerosene. On impact, plungers would crush
"Pr�parat", releasing neutrons, as shear pins broke, allowing the Uranium plates to come together via inertia and make a supercritical mass. The
device would then detonate, or at least melt down, causing massive contamination. The target was to be midtown Manhattan. Two prototypes MAY have been
built in 1945. Read the rest !!