The wall is intended to protect cities and key infrastructure from Russian glide bombs and Shahed-type drones.

Russian President Vladimir Putin “has put us on notice that we need to quickly build those steps of the ladder of the defense of our outer perimeter,” Poland's foreign minister said.

Russian drone strikes hit Kharkiv early Wednesday morning, injuring five people, according to local officials.

Britain and Belgium aren't blaming anyone for the mystery drones, but they're the latest in a series of airspace violations one NATO ally calls Russian "hybrid warfare."

Two Danish companies say they have a surge in new clients seeking to use their tech to protect sites that have been targeted by flyovers in recent weeks.

In a warehouse more than 1,500 kilometers (900 miles) from Ukraine's capital, workers in northern Denmark painstakingly piece together anti-drone devices. Some of the devices will be exported to Kyiv in the hopes of jamming Russian technology on the battlefield,

The U.S. on Wednesday sanctioned individuals and entities in several countries related to their support of Iran's ballistic missile and drone production, in the latest attempt to pressure Tehran.

Ukraine's drone attack on Russian bomber bases has underscored the urgency of fortifying U.S. military airfields.

Democrats are torn on what the party's senators got out of the shutdown deal. A Latvian company attempts to solve Europe's Russian drone problem. And, the S&P 500 index is on track to broadly underperform compared to foreign markets this year.

Airline passengers should brace for more flight disruption from drone and cyber attacks as threats mount against UK airports, an aviation regulator has warned.

Russia has been accused by NATO countries of hybrid warfare following unauthorized drone flights over critical infrastructure, which have caused flight suspensions, military alerts, and international concern.