How to make a nuclear bomb.

Then eight or nine months to extract the Plutonium, design and build the bomb. That's pretty fast too. Today, we might be able to do that a little faster too but not much. So, it took the Manhattan Project scientists about 2.5 years, so we might be able to do is in 2 to 2.5 years.

The basic mechanism of an atomic bomb. Once you've made enough uranium-235, though, creating critical mass is relatively easy. You start out with two smaller lumps of uranium and, when it's time to set the bomb off, bang them together at high speed. 

Fusion weapons are more complex.Oppenheimer was the wartime head of the Los Alamo Laboratory and is among those who are credited with being the "father of the atomic bomb" for their role in the Manhattan Project, the World War II undertaking that developed the first nuclear weapons.

inhaling large concentrations of uranium can cause lung cancer from the exposure to alpha particles. Uranium is also a toxic chemical, meaning that ingestion of uranium can cause kidney damage from its chemical properties much sooner than its radioactive properties would cause cancers of the bone or liver.