A Ukrainian serviceman guards a position near the front line as the conflict continues, in Mariinka, Donetsk region, eastern Ukraine, Saturday, April 20, 2019. The two presidential candidates for election on Sunday are pressing separate solutions for a resolution of the conflict in eastern Ukraine, where fighting with Russia-backed separatist rebels has killed more than 13,000 people since 2014. (Photo by Evgeniy Maloletka/AP Photo)
