There is a nuclear crisis in Iran because the IAEA cannot confirm that Iran's nuclear program is entirely peaceful. Iran claims it only wants nuclear power for energy, but the U.S. accuses Iran of seeking nuclear weapons. Under the Nuclear Non-Proliferation Treaty, Iran has the right to nuclear energy for peaceful purposes. However, fears remain that Iran may develop nuclear weapons and share them with other countries or groups. The international community has tried incentives and sanctions to persuade Iran to halt uranium enrichment activities.