If Ukraine joins NATO in the middle of the war, then Russia is at war with the entire NATO alliance. At the core of this conundrum is Article 5. Here's a closer look at what that means.

The US Navy SEALs are among the most elite Special Forces units in the world, and it comes as no surprise that their choice ...

Reuters.com is your online source for the latest NATO news stories and current events, ensuring our readers up to date with any breaking news developments ...

As NATO readies for what some believe is a new Cold War with Russia, the seventy-year-old alliance struggles to manage widening internal divisions.

Russia's foreign minister says NATO's decision to increase defence spending will be catastrophic for the alliance and could lead to its collapse. Meanwhile, officials in Ukraine said Russian ...

NATO members are set to agree on a new defense spending target of 5 percent of national GDP at the summit, though Trump said last week that the United States—currently at 3.4 percent—shouldn ...