A Ukrainian serviceman operates a first-person view drone during its flight over positions of Russian troops near the frontline town of Kostiantynivka, Donetsk region [File: Iryna Rybakova/Press Service of the 93rd Kholodnyi Yar Separate Mechanized Brigade of the Ukrainian Armed Forces/Handout via Reuters]

Moscow’s drone strikes have grown exponentially thanks in part to a deal with Iran to produce its Shahed drones on Russian soil. An attack overnight that focused on Kyiv killed at least 15.