Sweden gave Ukraine billions in weapons, drones, and its full fleet of armored vehicles. Gripen fighter jets, though, remain ...

There are inherent contradictions in the idea of the guarantees meant to prevent Russia from attacking Ukraine again.

Smoke from Canadian wildfires is causing air quality concerns for millions of Americans in the Midwest and Northeast.

Smoke and ash from three wildfires burning in Southern California prompt a smoke advisory from the South Coast Air Quality Management District.

Lithuania is pressing NATO for urgent support to strengthen its air defenses after two separate incidents involving Russian military drones violated its airspace in under a month.

Lithuania's foreign ministry has written to the NATO military alliance asking it to help strengthen its air defences, it said on Tuesday, after two military drones crossed into its territory from ...

The air quality in several U.S. states is taking a hit as smoke floats over the border from the Canadian wildfires. Here's what to know.

See map of Canadian wildfires Wildfire and smoke map Which states are affected by the Canadian fires? Areas in the following states are "Unhealthy for sensitive groups," according to AirNow ...

A cold front is bringing storms and lower temperatures to parts of the country, while the Midwest sees poor air quality from wildfire smoke.

A Ukrainian air force officer was arrested and charged with spying for Russia by leaking the locations of Kyiv’s prized F-16 and Mirage 2000 fighter jets, officials said.

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