Look on NPR and you will see the story on the main page...
Apparently the word is that Iran designed a terror plot designed to kill a Saudi Arabian diplomat on U.S. Soil. Why they would go to such great lengths to assassinate a diplomat who essentially is a "next door neighbor" all the way in U.S. territory is beyond me (and also beyond the comprehension of many intelligence experts). Many people suspect that this story has been cooked and is designed to stir up tensions among the American public against Iran. Still others think it was a manipulative plot by Iran to convince the U.S. to attack them, thus rallying Iran's people around the flag and most likely providing an excuse for more Middle East hostilities and possibly even WMD use.
These are signs of more trouble to come...