At the heart of NATO, the world’s longest-standing security alliance, is the notion that an attack on one is an attack on all. But with many in Europe doubting a Trump-led United States will really come through for them,

President Macron has aired the idea that France's deterrence force could be used to defend of other European countries.

Emmanuel Macron has proposed opening a dialogue with other European countries on France's nuclear deterrent, raising questions about what a French nuclear umbrella over Europe might entail –

President Emmanuel Macron has said he will launch a strategic dialogue on extending the protection offered by France's nuclear arsenal to its European partners.

With U.S. security commitments in question, discussions grow around France’s nuclear deterrence strategy for the continent.