MOSCOW - Ukrainians are watching the turmoil in Europe following the Brexit vote with sinking hearts. In early 2014, many Ukrainians staged the pro-European Union Maidan Revolution in the heart of Kyiv and overthrew their legally elected pro-Russian president over his decision to postpone an association agreement with the EU. They have since endured civil war, likely permanent rupture with Russia, their neighbor and former top trading partner, and a multitude of painful privations to pursue that goal of drawing closer to Europe.