Top News CNO Gilday: developing, building Australian nuclear submarine could take decades United States Naval Institute News U.S. says Iran can’t cross “irreversible threshold” Politico U.S. rules out redeploying tactical nukes to South Korea Voice of America United States CNO Gilday: developing, building Australian nuclear submarine could take decades United States Naval Institute News9/23/21 The U.S. Chief of Naval Operations noted that designing and constructing nuclear submarines for AUKUS could take decades, starting with an 18-month study to identify what is required of each country to begin. Middle East U.S. says Iran can’t cross “irreversible threshold” Politico9/23/21 Senior U.S. officials warn that nuclear talks will be dead if Iran reaches an “irreversible threshold” of technical knowledge. Iran-Saudi diplomacy intensifies as nuclear talks see momentum Bloomberg9/22/21 Iran has intensified diplomacy with Saudi Arabia and other regional powers as nuclear negotiations stall. Scoop: U.S. and Israel held secret talks on Iran “plan B” Axios9/22/21 The U.S. and Israel secretly met to discuss a “plan B” in case nuclear talks with Iran do not move forward. East Asia U.S. rules out redeploying tactical nukes to South Korea Voice of America9/24/21 A State Department official said the U.S. would not support a nuclear weapons sharing agreement with South Korea. North Korea offers talks, likely trying to get sanctions relief Associated Press9/24/21 Kim Yo Jong said North Korea is willing to resume talks with South Korea after “certain conditions” are met, likely referring to sanctions relief from the U.S. ANALYSIS: A call to arms: Kim Jong Un and the tactical bomb The Washington QuarterlyAnkit Panda 9/22/21 Tactical nuclear weapons are likely to be part of North Korea’s growing arsenal. South America Chile ratifies UN Nuclear weapon ban treaty ICAN9/23/21 Chile completed its ratification process for the Treaty on the Prohibition of Nuclear Weapons at the UN General Assembly on September 23, 2021. International ANALYSIS: Better monitoring and better spying: the implications of emerging technology for arms control Texas National Security ReviewJane Vaynman Fall 2021 Emerging technologies will have varying implications for arms control as countries balance transparency and security.