If a bomb of similar size to 'gadget' —the first ever detonation of a nuclear weapon during the Trinity test in 1945 —were detonated in New York, the destruction would be catastrophic.

"Gadget," the first atomic bomb — a 6-foot sphere with a grapefruit-sized Plutonium core, covered in cables — was born out of the Albert Einstein-inspired Manhattan Project, ...

Gadget, the world's first atomic bomb, was detonated on the morning of July 6, 1945, changing the course of history. Produced by Noah Friedman. Original reporting by Amanda Macias. Follow BI Video ...

In an attempt to get scientists to stop openly talking about bomb production, the first atomic bomb was named “Gadget.” It was tested at Trinity on July 16, 1945.

So the bomb was scrapped, and focus turned to Little Boy. Cue Uranium Little Boy was the same type of weapon as Thin Man—except for the fact that it used uranium rather than plutonium.