cking off warnings about U.S. naval operations in the Gulf ??? where the U.S. Navy 5th Fleet has a base in Bahrain.On Monday in Brussels, the EU's foreign policy chief Catherine Ashton urged Iran to offer "some concrete issues to talk about.It is very important that it is not just about words; a meeting is not an excuse, a meeting is an opportunity and I hope that they will seize it, she said a