Incumbent Ukrainian President and candidate Petro Poroshenko (2nd R), his wife Maryna Poroshenko (C) and their son Oleksii Poroshenko attend a prayer service at the St. Michael's Golden-Domed Cathedral on Palm Sunday, Kyiv, capital of Ukraine, April 21, 2019. The date of the runoff presidential election coincides with Palm Sunday. Ukrinform. /KDR/