Ukrainian soldiers watch a helicopter fly overhead outside the eastern town of Kramatorsk. Under Moscow's proposal for Ukraine's constitution, the east and other regions would be strongly autonomous. Evgeniy Maloletka/AP hide caption

itoggle caption Evgeniy Maloletka/AP

Armed pro-Russia activists stand outside the Ukrainian regional administration building in the eastern Ukrainian town of Slovyansk on April 14. Evgeniy Maloletka/AP hide caption

itoggle caption Evgeniy Maloletka/AP