Merkel: Preventing nuclear-armed Iran still 'vital interest'

German Chancellor Angela Merkel said that heading off the prospect of a nuclear-armed Iran, with tougher sanctions if needed, remains a "vital interest" for the world community, according to a report Thursday. Iran's nuclear program is "one of our biggest security policy concerns," Merkel wrote in an article for the daily Handelsblatt, which the newspaper posted on its Web site ahead of print publication on Friday.