Brexit would threaten economic, national security: Cameron

Prime Minister David Cameron on Monday warned that Britain's departure from the European Union would threaten its economic and national security, as the pound plunged on Brexit concerns. "Leaving Europe would threaten our economic and our national security," Cameron said in a report to parliament after dozens of MPs from his own Conservative party said they will vote for Brexit, including London mayor Boris Johnson. Cameron has called for an in-out referendum on Britain's EU membership after sec