Joan Chase Hinton ’42 holds a rare place in history as one of the scientists who took part in the construction of the first atomic bomb. After the bombing of Japan, Hinton devoted the rest of her life to peace activism. She left Los Alamos to lobby for civilian control of the atomic energy. It was an effort that culminated in the passage of the MacMahon Act, which set up a civilian commission for the control of atomic energy, and the creation of the United Nations Atomic Energy Commission.