Air-raid sirens sounded in Kiev on Tuesday for the 1,000th time since the start of the full-scale Russian invasion of Ukraine in February 2022, the regional military governor, Serhiy Popko, posted on Telegram. The sirens had sounded for a total of 1,165 hours and 26 minutes in that period, Popko said. “That’s more than 48 hours of uninterrupted alerts.” Ukrainians had been living in air-raid shelters for more than a month and a half, he said. But Ukrainians had become inured to the hardship, he added. The alert in Kiev on the 748th day of the war lasted exactly 17 minutes, according to officia…