FILE - This image taken from video released by the Russian Defense Ministry Press Service on Feb. 19, 2022, shows a MiG-31K fighter of the Russian air force carrying a Kinzhal hypersonic cruise missile parked at an air field during a military drills. (Russian Defense Ministry Press Service via AP, File)

FILE - In this photo released by Russian Defense Ministry Press Service on Tuesday April 13, 2021, a nuclear-capable strategic bomber of the Russian air force is shown on a training mission somewhere in Russia. (Vadim Savitsky/Russian Defense Ministry Press Service via AP, File)

FILE - This image taken from video provided by the Russian Defense Ministry Press Service on Feb. 19, 2022, shows a Russian IMobile launchers of Iskander short-range nuclear-capable missiles during a military exercise at a training ground in Russia. (Russian Defense Ministry Press Service via AP, File)

FILE - In this photo released by Russian Defense Ministry Press Service on May 21, 2024, Russian troops load an Iskander missile as part of drills to train the military for using tactical nuclear weapons at an undisclosed location in Russia. (Russian Defense Ministry Press Service via AP, File)

FILE - A trio of Tu-95 nuclear-capable strategic bombers of the Russian air force fly over Pushkin Square in Moscow, Russia, on May 3, 2014 during a rehearsal for the Victory Day military parade which will take place at Moscow's Red Square on May 9 to celebrate 69 years of the victory in WWII. (AP Photo/Pavel Golovkin, File)

FILE - Russian President Vladimir Putin, left, speaks at the Security Council meeting on nuclear deterrence at the Kremlin in Moscow, Russia, on Sept. 25, 2024. (Alexander Kazakov, Sputnik, Kremlin Pool Photo via AP, File)

FILE - In this photo released by Russian Defense Ministry Press Service on April 13, 2021, Russian nuclear submarines Prince Vladimir, above, and Yekaterinburg are harbored at a Russian naval base in Gazhiyevo, Kola Peninsula, Russia. (Russian Defense Ministry Press Service via AP, File)

FILE - In this image taken from a video distributed by Russian Defense Ministry Press Service, on Dec. 9, 2020, a Russian Tu-160 strategic bomber fires a cruise missile at test targets, during a military drills in Russia. (Russian Defense Ministry Press Service via AP, File)