原子爆弾開発
 


The Manhattan Project
Receiving permission from President Roosevelt to develop an atomic bomb in 1942, a laboratory in Los Alamos, New Mexico, and other facilities in the U.S., began atomic bomb research in secret. Given the code name "Manhattan Project," the development cost roughly $2 billion, an enormous amount at that time, and required the participation of more than 120,000 persons.

Successful Atomic Bomb Test in July
Even after the US government learned that Germany had given up on the attempt to develop an atomic bomb, it kept the project in gear without informing the scientists involved. On July 16, 1945, the world's first atomic bomb test was carried out in the desert near Alamogordo, New Mexico.

●The World's First Atomic Bomb Test

July 1945

Before the test, a 30-meter steel tower stood on this spot. The test vaporized the tower except for part of the base. The atomic bomb produced far more destructive power than the scientists had imagined.