However, almost a year after US President Donald Trump abandoned the JCPOA, the US imposed sanctions on Iran's low enriched uranium
and heavy water exports.
The low enriched uranium
is used for making fuel for nuclear power plants.
Obama appeared to suggest that there are ways for Iran to demonstrate its intent not to build a nuclear bomb other than ending all enrichment and reducing its stock of low enriched uranium
to a desired level.
At the time it was agreed, the US and its allies said that the deal did not see Iran giving up enough of its low enriched uranium
and pushed ahead with imposing a new round of UN backed-sanctions.
The growing policy rift between India and the US has now come into the open with Foreign Minister S M Krishna welcoming the Tehran's decision to send its low enriched uranium
stock to Turkey.
The uranium will be converted to low enriched uranium
fuel and will be completed under the auspices of the IAEA, according to a released statement from the White House.
In October last year, the IAEA drew up a plan for Iran to begin shipping out most of its stockpiles of low enriched uranium
in return for the supply by France and Russia of uranium enriched to the 20 percent level required for a Tehran medical research reactor.
Tehran says it prefers to buy reactor fuel from foreign suppliers rather than part with its low enriched uranium
, that can be used for bombs if enriched further.
The proposal requires Iran to send 1.2 tons of its 1.5 ton Low Enriched Uranium
(LEU) stockpile to Russia by the end of the year.
=93It appears that Iran has walked right up to the threshold of having enou= gh low enriched uranium
to provide enough raw material for a single bomb,=94 s= aid Peter Zimmerman, a former chief scientist of the US Arms Control and Disarmament Agency
"A year ago we were talking about the Iranians making enough low enriched uranium
to be put in a little glass vial and shown to the press", said Prof Peter Zimmerman, former chief scientist of the US Senate Foreign Relations Committee.