Ukrainian forces are withdrawing from the key city of Severodonetsk, effectively ceding the city to Russia and putting the eastern Ukrainian region of Luhansk almost fully\xa0under Russian control following months of grueling and bloody fighting. CNN's Salma Abdelaziz reports live from Kyiv.\xa0\nTo learn more about how CNN protects listener privacy, visit cnn.com/privacy\nLearn more about your ad choices. Visit megaphone.fm/adchoices