10. Iran
Estimated Warheads: 0
First Test: No confirmed test
Most Recent Test: No confirmed test
Total Tests: No confirmed test
A number of Western nations have placed economic and arms-related sanctions on Iran since 2010, when the International Atomic Energy Agency said Tehran was pursuing technology that could be used to build nuclear weapons.
Last year, the IAEA confirmed that Iran had begun enriching uranium at its Fordo nuclear facility, the report stated.
Iran maintains its nuclear program is for civilian energy purposes only. But the IAEA has said it cannot verify whether the intent of the program is for peaceful means.