Rachel Rizzo is a researcher in the Brent Scowcroft Center on International Security
The EU needs a plan sooner than later.
It is not only how much a nation spends on defense that matters, but what that nation spends it on and its willingness to use it.
Bremain is Britain's best bet.
Anti-immigrant rhetoric threatens Europe's identity.
ISIS is a serious concern, but it doesn't pose an existential threat.
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