How J. Robert Oppenheimer brought together thousands of scientists to build the world's first atomic bomb

J. Robert Oppenheimer directed the Manhattan Project, which produced the world's first atomic bombs.

The Manhattan Project, launched in 1942, united scientists from the US, Britain, and Canada, driven by fears that Nazi Germany might develop nuclear weapons first.

Oppenheimer served as scientific director at Los Alamos Laboratory in New Mexico, managing over 130,000 people across secret sites.

The Trinity test on July 16, 1945, in New Mexico detonated the world's first nuclear weapon, a plutonium implosion device called 'the Gadget', with a yield of 25 kilotons.

The success marked the beginning of the nuclear age, demonstrating the capability to destroy a whole city in seconds.