During the Cold War, the Kremlin worried about the threat posed by American nuclear missiles. Now, Russian leaders seem panicked at the thought of an American nuclear reactor at their doorstep. Since the United States and Armenia signed a nuclear cooperation deal on February 9 during Vice President JD Vance’s visit to Yerevan, the Kremlin has seemingly gone to a civilian equivalent of DEFCON 3 with a wide-ranging effort to scuttle the construction of a US-designed nuclear plant on Armenian soil. In addition to media…