John H. Manley

American physicist, group leader during the manhattan project (1907–1990).

Born July 21st, 1907 in Harvard.

Died June 11th, 1990 at 82 years old in Los Alamos. [ref]

Occupations
nuclear physicist, physicist, university teacher
Wikipedia

You needn’t die happy when your time comes, but you must die satisfied, for you have lived your life from the beginning to the end. Stephen King