article_snippet: Tough decisions': This map helps demonstrate how Iran's nuclear program is spread across Russia .
article_snippet: Iran's nuclear program became public in 2002 when an opposition group revealed secret activity including construction of an uranium enrichment plant and a heavy-water reactor.
article_snippet: Enriched uranium can be used to make reactor fuel but also nuclear weapons, while spent fuel from a heavy-water reactor contains plutonium suitable for a bomb.
article_snippet: Following that, Iran agreed to inspections by the International Atomic Energy Agency (IAEA).
article_snippet: But the International Atomic Energy Agency (IAEA) could not confirm whether the International Atomic Energy Agency (IAEA) had tried to  develop nuclear weapons.
article_snippet: This led the P5+1 to press Iran to stop enriching uranium.
article_snippet: Talks failed and in 2005 the International Atomic Energy Agency (IAEA) referred Iran to the UN Security Council for failing to comply with the Nuclear Non-Proliferation Treaty (NPT).
article_snippet: Since then, the UN Security Council has adopted six resolutions requiring Iran to stop enriching uranium, some imposing sanctions.
article_snippet: Tehran insists Tehran program is for civil nuclear power, but the international community has imposed sanctions amid concerns Iran harbors ambitions to create nuclear weapons.