the tarp is removed and the bomb is readied for loading

soldiers check the casings on the fat man atomic bomb multiple test bombs were created on tinian island all were roughly identical to an operational bomb even though they lacked the necessary equipmen

soldiers and workers sign their names and other messages on the nose of fat man

the bomb and its trailer are lowered down into the pit using a hydraulic lift

once inside the plane the bomb is secured and all connections and equipment are checked again

on the left geophysicist and manhattan project participant francis birch marks the bomb unit that would become little boy while norman ramsey who would later win the nobel prize in physics looks on

heres a closer look

from there both little boy and fat man were flown over hiroshima and nagasaki respectively and detonated world war ii ended shortly afterwards

fat man is loaded onto a transport trailer and given a final once over

once little boy is ready the enola gay a boeing b 29 superfortress bomber is reversed and positioned over the trench

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a technician applies sealant and putty to the crevices of fat man a final preparation to make sure the environment inside the bomb would be stable enough to create a full impact once it detonated

at the airfield fat man is lined up over a pit specifically constructed for it from which it is then loaded into the plane that eventually dropped it over nagasaki

the bomb is then escorted to the nearby north field airbase on tinian shrouded in tarp

using the hydraulic lift little boy is carefully raised and loaded into the belly of the enola gay

workers check little boy one last time keeping the tarp on for security reasons following a similar lowering procedure like the one done for fat man three days later