Business Insider got access to a NATO AWACS flight for an eight-hour surveillance mission over Eastern Europe.

NATO chief Mark Rutte is pushing the Allies to swiftly build up their jet fighters and missiles to avert an all-out war with ...

The defense alliance of 32 countries is planning to invest billions in its security over the coming decade. But it’s a splurge that some European NATO members, saddled with huge debt burdens, can ...

Part of the agreement involves a commitment to buy American oil and gas. Over the course of the Russia-Ukraine war, now in ...

The best candidate, at least for the near term, has granular understanding of existing forces and informal links to suppliers ...

As the front lines froze, and air defenses got better, Russia and Ukraine pivoted away from close bombing runs to standoff ...

European nations are the leading buyers of American-made weapons. The bottomless need for armaments to help Ukraine fight ...

Business Insider flew aboard the decades-old aircraft during a recent surveillance mission. NATO plans to replace the E-3 in ...

The path forward requires setting aside both illusions and grievances at a time when security guarantees must be earned rather than assumed. In this emerging reality, Eastern European nations can ...

This year's NATO summit opens Tuesday, attended by a disengaged United States, which seems bent on fighting its own battles, rather than helping European allies with the increased threat from Russia.

It’s one sentence that could launch a world war—or prevent one. Article 5 is NATO’s ultimate safeguard, and its greatest risk ...