Mona Charen: “In the Netherlands this week, President Barack Obama confessed a fear: ‘I continue to be much more concerned, when it comes to our security, with the prospect of a nuclear weapon going off in Manhattan.’ It would be reassuring to think that the president worries about this (when he’s not busy filling out his NCAA brackets), except that he is failing to do the most important thing to prevent such a catastrophe. … While we are clinking glasses with Iran in negotiations in Vienna, the U.S. State Department continues to list Iran as a state sponsor of terror. In 2012, Iran participated in planned terror attacks in India, Thailand, Georgia and Kenya. It provided aid and training to the Taliban, Shia groups in Iraq, Hezbollah in Lebanon, and continues to cooperate in various ways with al-Qaida. The president should curl up some evening with the State Department’s country reports. They’re not beclouded by wishful thinking. … If Obama does lose sleep worrying about nuclear terrorism, he should drop his naive parlay with Iran. He may fondly envision a new cordiality between old foes. That’s not what they see.”