On the first day of the operation, Mix sent a message back to his supervisor that read, "Too much flowrate -- over 15, 000 and too large an orifice, " an FBI affidavit outlining the charges states.

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Many argue the euro zone's survival now depends on rapid moves towards full political and fiscal union, with a single European banking supervisor, a common deposit guarantee fund and resolution fund, a central European treasury operation and common issuance of bonds a formidably high hurdle.

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