The bomber would take off with no fissile material in the bomb.
For final determination, a test needs to be made with real fissile material.
The biggest challenge is making the fissile material to put inside it.
Individuals were trying to steal fissile material, the report said.
Even without a reactor, Iraq may already have the fissile material it needs.
Enough fissile material was not going to be available before mid-1945.
The plutonium-239 was very desirable because it is a fissile material.
India is said to have enough fissile material for perhaps 50 nuclear devices, maybe more.
Put the two together and you have the fissile materials for some literary fireworks.
There were many ways of arranging the fissile material into a critical mass.