Snake Island, in the Black Sea, is a key battleground in the Ukraine war. Satellite images show how Russian forces are using the island to strengthen their military capabilities and block ships carrying grain, as Moscow continues its push in eastern Ukraine. Photo composite: Eve Hartley More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com/ Visit the WSJ Video Center: https://wsj.com/video On Facebook: https://www.facebook.com/pg/wsj/videos/ On Twitter: https://twitter.com/WSJ On Snapchat: https://on.wsj.com/2ratjSM #SnakeIsland #Ukraine #WSJ