ukrainian students go to incredible lengths to continue learning in the face of war. let's go "out front." good evening, i'm erin burnett. "out front," breaking news, russian shelling bombardment multiple cities as the foreign ministry says the leader of mariupol was abducted by russians. mayor federov detained. this is according to ukraine's parliament on its official twitter account. they say they put a plastic bag on his head. we will have much more on that breaking and disturbing story in the moment. first, though, putin's brutal campaign is widening this hour. new video shows heavy shelling in southern ukraine. we are getting new satellite images of russians firing artillery 18 miles north of the capital. you see the flash of smoke. obviously, this is all escalating four miles to the east, more images show what