During the Cold War, while relying upon a balance of terror to keep the peace, the superpowers agreed to permit the development of nuclear know - how in pursuit of peaceful ends but to restrict its use in making nuclear weapons.
Toetudes külma sõja ajal rahu hoidvale terroritasakaalule, leppisid suurriigid kokku, et annavad loa tuumaalase oskusteabe hankimiseks rahumeelsetel eesmärkidel, kuid piiravad selle kasutamist tuumarelvade valmistamiseks.