Russian troops entered Ukraine's Crimea region on Saturday following a parliamentary green light for President Vladimir Putin to interfere militarily. Officials in Kiev had earlier said Russia had already dispatched 30 armoured personnel carriers and 6,000 additional troops into Crimea to help pro-Kremlin militia gain broader independence from the new pro-EU leaders in Kiev. Obama called on Putin to pull his troops back to Russian barracks in the Crimean peninsula. http://english.ahram.org.eg/News/95634.aspx