an Entity references as follows:
The nuclear program of Iran is an ongoing scientific effort by Iran to research nuclear technology that can be used to make nuclear weapons. Iran has several research sites, two uranium mines, a research reactor, and uranium processing facilities that include three known uranium enrichment plants. As of 2015, Iran's nuclear program has cost $100 billion in lost oil revenues and lost foreign direct investment because of international sanctions ($500 billion, when including other opportunity costs).