AdvertisementUkraine's Kharkiv moves classrooms underground so kids survive Russian attacksPlay07:49Download AudioMarch 27, 2024Joanna KakissisClaire HarbagefacebookEmailMaksym Timchenko, 7, (center) raises his hand while his teacher, Liudmyla Demchenko, addresses the classroom in the school inside a subway station in Kharkiv, Ukraine. (NPR)