Mariupol residents express concerns about the future as patriotic flags and armoured vehicles return to the streets -- never a good sign in a frontline Ukrainian port that offers a land bridge between Russia and Crimea. The Sea of Azov city of Mariupol has seen its share of misfortune since war first came to this contested corner of eastern Europe eight years ago. It switched hands a few times in vicious fighting that obliterated parts of the city's eastern outskirts in 2014. IMAGES AND SOUNDBITES