m Actor Mark Hamill lent his voice to "Air Alert" -- an app linked to Ukraine's air defense system. In the invasion's first year, air-raid alarms sounded more than 19,000 times across the country, said Valentine Hrytsenko, the chief marketing officer at Ajax Systems, a Ukrainian security systems manufacturer that co-developed the app. Although the app also has a Ukrainian-language setting, voiced by a woman, some Ukrainians prefer to have the baritone of Hamill, Luke Skywalker of "Star Wars," breaking the bad news that a Russian bombardment might be imminent. When the dangers from the skies pass, Hamill announces via the app that "the air alert is over." He then signs off with an uplifting: "May the Force be with you." When air raid sirens start howling, the app warns Ukrainians that Russian missiles, bombs and deadly exploding drones could be incoming. Hamill is also raising funds to buy reconnaissance drones for Ukrainian forces. "In Ukraine, there are power outages and food shortages and people are really suffering," he said. "It motivates me to do as much as I can." Air Alert has been downloaded more than 14 million times.