Pledge of Access , Unfulfilled Iran 's legal obligations began in 1968 , when Tehran signed the Nuclear Nonproliferation Treaty , which requires countries to forgo nuclear weapons in exchange for aid in developing peaceful atomic energy .
Iran /location/location/contains Tehran
Iran /location/country/capital Tehran
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Iran
LOCATION
Tehran
LOCATION
/location/location/contains
Iran
LOCATION
Tehran
LOCATION
/location/country/capital