Russia and Ukraine both stepped up security on the de facto border between Crimea and mainland Ukraine on August 11, a day after Moscow accused Kyiv of planning terror attacks on the annexed peninsula.
The Guardian: Russia and Ukraine step up security amid tension over Crimea
Ukrainian paratroopers line up before boarding helicopters during military drills in the Zhytomyr region, some 150 kilometers from Kyiv, on March 6, 2015.
