Ukrainian government soldiers sit on an armoured vehicle as they take up a position in a sunflower field around 20 Km south of Donetsk on July 10, 2014. Ukrainian forces have massed tanks and armoured vehicles around 20 kilometres (12 miles) south of the rebel-held city of Donetsk. A column of vehicles stretching a kilometre and a half (one mile) arrived on Wednesday without facing any resistance, Ukrainian soldiers said, as part of a campaign to surround Donetsk and the neighbouring city of Lugansk, also controlled by pro-Russian separatists. AFP PHOTO / DOMINIQUE FAGET (Photo credit should read DOMINIQUE FAGET/AFP/Getty Images)