Lydia johnson is seventeen when the atomic bomb is dropped on Japan in 1945. Her family had just moved from the valley that later became known as oak ridge, tennessee. In a vast undertaking called the manhattan project, ...Lydia johnson is seventeen when the atomic bomb is dropped on Japan in 1945. Her family had just moved from the valley that later became known as oak ridge, tennessee. In a vast undertaking called the manhattan project, the government took over the valley for the construction of the atomic bomb.