Ukrainian drones hit several Russian strategic airfields, including a military base deep in eastern Siberia, while Moscow launched one of its longest drone and missile attacks against Kyiv, escalating tensions ahead of crucial peace talks this week.

By making harsh, uncompromising demands in peace talks with Ukraine while continuing to pummel it with waves of missiles and drones, Russian President Vladimir Putin is sending a clear message: He will only accept a settlement on his terms and will keep fighting until they’re met.