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Ukrainian soldiers stand at a checkpoint they seized in the early morning in the village of Andreevka, 7 km from the center of the southern Ukrainian city of Slavyansk, on May 2, 2014. Ukraine's military lost two helicopters and two servicemen on May 2 in a deadly offensive launched just before dawn against pro-Russian rebels holding the flashpoint town of Slavyansk, insurgents and authorities said. AFP PHOTO / VASILY MAXIMOV