Russian President Vladimir Putin listens to Uzbekistan's President Shavkat Mirziyoyev during their meeting on the sidelines of the St. Petersburg International Economic Forum at the Constantine Palace in St. Petersburg, Russia, on Thursday, June 4, 2026. (Sergei Bobylev, Sputnik, Kremlin Pool Photo via AP) ST. PETERSBURG, Russia — President Vladimir Putin said Thursday that Russia will strengthen its air defenses to counter recent Ukrainian drone attacks, which have reached deep inside his country and cast a cloud over his showcase economic forum in his hometown of St. Petersburg.Speaking in response to a question from The Associated Press during a meeting…