A pro-Russian rebel stands next to damaged buses in Donetsk on February 11, 2015. Shelling hit a central bus station in Donetsk on February 11, 2015 and killed at least four people, according to a local official. Intense fighting in Ukraine, including a devastating rocket strike on Kiev's military headquarters in the east, killed at least 37 people on February 10, on the eve of a four-way peace summit in Minsk.   AFP PHOTO / VASILY MAXIMOV        (Photo credit should read VASILY MAXIMOV/AFP/Getty Images)