Fresh violence erupted in eastern Ukraine Tuesday as thousands of pro-Russian protesters stormed key buildings, escalating the crisis after Moscow hit back at “Iron Curtain”-style Western sanctions. A mob spearheaded by around 30 men carrying Kalashnikov assault rifles and grenade-launchers attacked the regional police headquarters in Lugansk, raising the heat in the worst East-West confrontation since the Cold War. They had earlier seized the regional prosecutors’ office, tearing down the Ukrainian flag and replacing it with that of Russia, which the West blames for stoking the violence in the ex-Soviet Republic. More than a dozen towns and cities in the east have now fallen to pro-Russian rebels, who see the Western-backed leaders in Kiev as illegitimate “fascists” and want either independence or outright accession to Russia. More