J Robert Oppenheimer: An American theoretical physicist often called "father" of atomic bomb for his role as scientific director at Los Alamos Laboratory during Manhattan Project.
Enrico Fermi: An Italian physicist who created the world's first nuclear reactor, and contributed to the development of quantum theory, nuclear and particle physics. He was a key player in Manhattan Project.
Los Alamos Laboratory: A United States Department of Energy national laboratory initially organized during World War II for the design of nuclear weapons as part of the Manhattan Project.