President Vladimir Putin said Thursday that Russia’s air defense were to blame for downing an Azerbaijani jetliner in December that killed 38 people, his first public admission of responsibility for the crash in an effort to ease tensions between the neighbors. Putin said the missiles fired by Russian air defenses to target a Ukrainian drone exploded near the Azerbaijan Airlines plane flying from Baku as it was preparing to land in Grozny, the regional capital of the Russian republic of Chechnya, on Dec. 25, 2024. Ukrainian drones have regularly struck deep inside Russia.