Analysts had surmised that Russia was having trouble with the drones, but if a problem has been fixed, it remains unclear how long the Kremlin can sustain such attacks…After a three-week lull, Russia launched a swarm of Iranian-made drones at Ukraine ’s capital, Kyiv , but it was unclear if the assault represented a lasting shift in Moscow’s campaign to sow destruction and terror with strikes on civilian targets…Analysts had surmised that Russia was having trouble with the drones, but if a problem has been fixed, it remains unclear how long the Kremlin can sustain such attacks.