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

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

French President Emmanuel Macron says that he's ready to start discussions on nuclear deterrence with European allies. Macron has hinted that France could help to protect other nations after U.S. President Donald Trump raised questions both about the trans-Atlantic alliance and the defense of Ukraine.

European leaders showed a cautiously receptive ear to President Emmanuel Macron's proposal to debate extending the French nuclear umbrella to Europe on Thursday, though some were reluctant to draw a line under years of U.

With the U.S. showing signs of retreating from its traditional security role, Macron has intensified efforts to strengthen European defense, including proposals to expand Frances

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