Sanctions against Iran starting to bite...

But, we need a concerted effort from the US and EU to really ensure the sanctions hurt...

An Iranian official threatened retaliation on Monday after Germany, Britain and the United Arab Emirates refus to provide fuel to Iranian passenger planes following unilateral U.S. sanctions on the Islamic state, the ISNA news agency reported.

"Since last week, our planes have been refused fuel at airports in Britain, Germany and U.A.E. because of the sanctions imposed by America," Mehdi Aliyari, Secretary of Iranian Airlines Union, told ISNA news agency.