Which state was the first to create atomic weapons?

The first state to create atomic weapons is the United States of America. The impetus for the development of this weapon was a message from Albert Einstein to President Roosevelt, which said that the Germans were also trying to create atomic weapons to win the Second World War. In 1242, a nuclear center was created in Los Alamos, in which the atomic bomb was developed for 3 years. On July 16, 1945, an atomic bomb was detonated in the Jemez Mountains in New Mexico. This was the beginning of the atomic era.