Sam Augustus Nunn, Jr. (Date of birth 8th September 1938, Georgia USA) is a former US Senator.
Nunn was elected as a Democratic Senator for Georgia in 1972. He retained this position until 1997. He is currently Chief Executive Officer of the Nuclear Threat Initiative (NTI) an organisation attempting to reduce the threat of nuclear, chemical and biological weapons.
He is known to be an informal advisor to President Barack Obama.