Ukraine has intensified missile and drone strikes on Russia. Russian air defenses are stretched, prompting efforts to find other approaches to protect domestic targets.

Ukrainian President Volodymyr Zelenskyy warned allies that the defense of his nation is a litmus test for broader Western resolve.

The unmanned aircraft carrying explosive warheads are part of a Ukrainian campaign of long-range drone attacks that aim to inflict blows on Russia far behind the front line as Moscow's troops advance in the east.

Ukraine is using unmanned aircraft carrying explosive warheads as part of a campaign of long-range drone attacks, aiming to inflict blows on Russia far behind the front line. Kyiv's military granted Reuters exclusive access during the launch of the drones.

Ukraine's drone attack on a critical Russian oil refinery intensifies the conflict's energy infrastructure warfare component, while Trump calls for OPEC to lower oil prices to end the war.