THE PEOPLE INVOLVED

J. Robert Oppenheimer, born on the 22nd of April, 1904, New York, U.S. was an American theoretical physicist and science administrator, noted as director of the Los Alamos Laboratory (1943–45) during development of the atomic bomb.

He is often regarded as "The Father of the Atomic Bomb" for his immense contributions to its creation. 

Leslie Richard Groves, born on the 17th of August, 1896, Albany, New York, U.S. was an American army officer in charge of the Manhattan Engineer District (MED).

Franklin D. Roosevelt, the 32nd President of the United Sates, was the man who begun the Manhattan Project. On December 28, 1942, he authorized the formation of the Manhattan Project to combine various research efforts with the goal of weaponizing nuclear energy.