PARIS — 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 ...

Critics once called it isolationist. But national security experts now say Donald Trump’s "America First" strategy is proving to be something else entirely — a hard-nosed policy of deterrence built on ...

For more than a century, U.S. diplomats in Russia have had to fend off propaganda, outright lies, harassment and seduction, often simultaneously. Our envoys have been gulled into damaging concessions, ...

Each side must predict how the other will react to avoid mutual destruction. By Amanda Taub Reporting from London For years, the conflict between Israel and Iran had unofficial but fairly clear rules, ...