Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. US Lawmakers: Iran, North Korea Are Biggest Threats to Nuclear Nonproliferation Treaty Eunjung Cho WASHINGTON - U.S. lawmakers stressed that Iran and North Korea pose the biggest threats to the Nuclear Nonproliferation Treaty (NPT), in a hearing Tuesday marking the 50th anniversary of the treaty. Democratic Congressman Theodore Deutch, chairman of the Middle East, North Africa, and International Terrorism subcommittee of the House Foreign Affairs Committee, said, "Congress must understand how to protect the treaty from two immediately looming challenges: Iran and North Korea." Deutch pointed out North Korea is the only state that has withdrawn from the NPT and the U.S. must work with the international community to ensure that Iran does not go down the same path. Iran's threats Republican Congressman Joe Wilson was among many who expressed concerns over Iran's repeated threats to quit the NPT. "The North Korean case has served as a model for the mullahs in Iran. They learned that through threatening to leave the NPT they can hold the international community hostage and extract important concessions. The Iranians have also learned that the violations or abrogation of NPT come with absolutely no penalties," said Wilson. Iran first threatened to exit the NPT in May 2018 following President Donald Trump's announcement of the U.S. withdrawal from the JCPOA, the Joint Comprehensive Plan of Action. Iran also has taken incremental steps to reduce its compliance with the nuclear deal it forged with the U.S., China, France, Russia, Britain and Germany. Despite Iran's threats, experts who testified at the hearing held views that Iran will not easily drop out of the NPT. .