A Ukrainian serviceman cleans his machine gun on the frontline in the village of Maryinka in the Donetsk region on July 21, 2015. The Ukrainian army has been fighting pro-Russian militants for more than a year in the country's east in a conflict in which more than 6,500 people have been killed. AFP PHOTO/ ANATOLII STEPANOV        (Photo credit should read ANATOLII STEPANOV/AFP/Getty Images)