FILE - A Pakistani-made Shaheen-III missile, that is capable of carrying nuclear warheads, are displayed during a military parade to mark Pakistan National Day, in Islamabad, Pakistan, on March 23, 2022. The world's nine nuclear-armed states continue to modernize their nuclear weapons as the countries continue to deepen their reliance on such deterrence in 2023, a Swedish think tank, the Stockholm International Peace Research Institute said Monday, June 17, 2024. In Asia, India, Pakistan and North Korea are all pursuing the capability to deploy multiple warheads on ballistic missiles, the institute said. (AP Photo/Anjum Naveed, File)
FILE - In this image released by Russian Defense Ministry Press Service on Tuesday, May 21, 2024, a Russian Iskander missile is seen during drills to train the military for using tactical nuclear weapons at an undisclosed location in Russia. The world's nine nuclear-armed states continue to modernize their nuclear weapons as the countries continue to deepen their reliance on such deterrence in 2023, a Swedish think tank said Monday, June 17, 2024. (Russian Defense Ministry Press Service via AP, File)
FILE - This image taken with a slow shutter speed on Oct. 2, 2019, and provided by the U.S. Air Force shows an unarmed Minuteman 3 intercontinental ballistic missile test launch at Vandenberg Air Force Base, Calif. The world's nine nuclear-armed states continue to modernize their nuclear weapons as the countries continue to deepen their reliance on such deterrence in 2023, a Swedish think tank said Monday, June 17, 2024. (Staff Sgt. J.T. Armstrong/U.S. Air Force via AP, File)
FILE - In this photo released by Russian Defense Ministry Press Service on Friday, Feb. 2, 2024, Russian troops load an Iskander missile onto a mobile launcher during drills at an undisclosed location in Russia. The world's nine nuclear-armed states continue to modernize their nuclear weapons as the countries deepened their reliance on such deterrence in 2023, a Swedish think tank said Monday June 17, 2024. (Russian Defense Ministry Press Service via AP, File)
FILE - This image taken from video broadcasted by North Korea's KRT shows what it says is a ballistic missile being launched from an undisclosed location in North Korea, Monday, Feb. 20, 2023. The world's nine nuclear-armed states continue to modernize their nuclear weapons as the countries continue to deepen their reliance on such deterrence in 2023, a Swedish think tank, the Stockholm International Peace Research Institute said Monday, June 17, 2024. In Asia, India, Pakistan and North Korea are all pursuing the capability to deploy multiple warheads on ballistic missiles, the institute said. (KRT via AP, File)