Bonds between Europe and North America are under strain and there's no guarantee the trans-Atlantic alliance will survive, the head of NATO warned Thursday.
Secretary-General Jens Stoltenberg called for an international effort to shore up the military alliance, amid divisions between Europe and the United States over trade, climate change and the Iran nuclear deal.
"It is not written in stone that the trans-Atlantic bond will survive forever," Stoltenberg told an audience in London. "But I believe we will preserve it."
NATO has been shaken by U.S. President Donald Trump's "America first" stance and mistrust of international...