The props were simple, the message was clear. In a video address to the nation this week, Ukrainian President Volodymyr Zelenskiy held up his smartphone to the camera and started a timer app while an air raid siren blared.
"It lasted 20 seconds," Zelenskiy said, after the wailing subsided. "And we hear it for hours, days, weeks. Our people... instantly take their children, help the elderly, and go to the shelters... to survive, from Russian missiles, bombs."
