After Ukraine’s drone strikes on Russian air bases, the two sides talked for less than an hour in Istanbul, and a halt to the fighting seems out of reach for now.

The head of the Security Service of Ukraine, Vasyl Malyuk, said a day after the strike that 41 enemy aircraft were destroyed. Other assessments, however, including one by BBC News Ukraine, tallied a more modest number, upward of 11 destroyed jets.

Russia’s forces are using cheap systems to saturate Ukraine’s overburdened air defenses—while saving its better cruise missiles for when the country cannot defend its airspace at all.