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

Whether Russia has changed the targets of its massive strikes, why the Russian army attacks with dozens of drones every day, and whether Ukraine can influence Russia's ability to launch massive strikes - read in the RBC-Ukraine's article.

Ukraine said on Friday it had struck a Russian oil refinery and a microchip factory in a huge drone attack that caused fires at the refinery's production facilities and an oil pumping station. Russia said hours earlier that its forces had repelled an overnight drone attack,