Alva Review-Courier -

KYIV, Ukraine (AP) — Ukrainian drones struck two air bases deep inside Russian territory, the Kremlin said Monday, shortly before Russian forces unleashed a massive missile barrage in Ukraine that struck homes and buildings and killed civilians.

The unprecedented attack in Russia threatened a major escalation of the nine-month war because it hit an airfield housing bombers capable of carrying nuclear weapons. President Vladimir Putin has threatened to use all available means to defend his land, a remark many have interpreted to include nuclear weapons.

Russia has been launching almost weekly b...