Ukrainian troops have taken four villages back from Russian occupation in the south near the city of Kherson, a Ukrainian military source tells CNN. Their main “target” is Kherson, the source added. “The operation began at night with massive shelling of Russian positions and the rear,” the source, who CNN is not naming for security reasons, said. “The main direction of the attack was on Pravdyne. We hit their infantry from the DNR (Donetsk People's Republic) and LNR (Luhansk People's Republic), and they fled. The Russian landing force fled after them," the source told CNN. “We have now liberated four...