Russia’s increased military buildup along Ukraine’s eastern border signals the possibility of a full-scale invasion and one that could lead to a worst-case global scenario, pitting NATO allies against old Russian foes and debilitating the global economy to nothing short of catastrophe if nothing is done to stop Moscow’s aggression, U.S. officials and analysts told TheBlaze. And the crisis seems to be heading in that direction. On Friday, more Russian troops and armored vehicles were seen offloading from ships in the Crimean harbor, reporters in the area said. The day before, Russia had already massed more than 8,000 troops and...