EU quietly braces for nightmare scenario of multiple-casualty hybrid attack

BRUSSELS — EU capitals are quietly preparing for how the bloc should respond to a major hybrid attack that leaves several citizens dead — an outcome that looks increasingly likely, according to five EU diplomats and officials. But the efforts to prepare are exposing splits on how much of a role the EU should play on security matters, and whether the bloc's efforts are redundant with NATO. The talks about a nightmare attack scenario have taken place in recent weeks among EU ambassadors from all 27 countries gathering in "restricted format," meaning without phones or assistants.