no one.
They has fled the fascist government in Germany
The Manhattan project scientists headed by Robert Oppenheimer.
1949 thru 1950 prompted by USSR atomic bomb test.
They did test the bomb first, in 1945 at the White Sands Proving Grounds near Socorro, New Mexico.
It was not tested in a city at all. It was tested in the dessert, and at sea.
On July 16th 1945, the US tested their atomic bomb called Trinity in the Jornada Del Muerto desert in New Mexico. This test often marks the beginning of the Atomic Age, as the Trinity tests were followed by the atomic bomb in Nagaski, Japan in August 1945.
the us created the atomic bomb
The US needed a place to test the bomb, and the desert in New Mexico was the best place.
1. Japan didn't give up easy. 2. US were eger to test their newly developed A-Bomb and to be a world leader.
ethical concerns
the US army headed a secret team of scientists called the Manhattan project - they did the science, developed the ideas and worked with engineers to make the first atomic bomb on 1944-1945.