NATO’s secretary general, in his first trip to the once-volatile Western Balkans, has underscored the alliance’s “steadfast ...

Confidence in America's role in safeguarding its allies in Europe is wavering, while Washington has launched into a trade war ...

If Trump does make that change, it would mark a significant shift from a core tenet of the alliance known as Article 5, which says that an attack on any NATO country is an attack on all of them.

Here's what's at stake as Ukrainian and US officials prepare for crunch talks this week in Riyadh, Saudi Arabia.

But NATO without the US is far from impotent, with more than a million troops and modern weaponry at its disposal from the 31 other countries in ... effectively lose it all,” Lough said.

Mike Martin MP, who is also on the National Security Strategy Joint Committee, said American "ambivalence" to European ...

Under that article, should any NATO nation become the victim of an armed attack, the other members will consider it as an attack against all members ... from some random country that hasn't ...

WASHINGTON — President Donald Trump on Thursday expressed uncertainty that NATO would come to the United States' defense if the country were ... an attack on all. Trump on Thursday also seemed ...

NATO will not let a security vacuum develop in Bosnia and Herzegovina at this time of crisis but political leaders should ...

WASHINGTON — President Donald Trump on Thursday expressed uncertainty that NATO would come to the United States’ defense if the country were ... an attack on all. Trump on Thursday also ...

President Donald Trump cast doubt Thursday on a core tenet of the NATO security alliance — that an attack on one member is an attack on all and must ... whether the country’s European allies ...