The EU’s top diplomat, Josep Borrell, yesterday announced that 150,000 Russian troops are concentrated on Ukraine’s eastern border and in Crimea

. Noting that the deployment includes field hospitals, he warned that only “a spark” could set off a conflict. On Saturday, four large landing ships from Russia’s Baltic and Northern fleets entered the Black Sea. From the east, 15 smaller ships from Russia’s Caspian Flotilla also entered the Black Sea. Russia’s Southern Military District said Saturday that over 50 aircraft were involved in an exercise over the Black Sea.