Ukraine knocks out Russian refinery in major attack
Ukraine launches drone attack on Russian oil refinery, causing significant damage.
Ukraine launches drone attack on Russian oil refinery, causing significant damage.
Russian President Putin emphasizes nuclear readiness amid tensions with Ukraine and US.
Sweden joins NATO after Russia's invasion of Ukraine amid growing support for the alliance.
French government institutions hit by cyberattacks of "unprecedented intensity" ahead of Paris Olympics.
Intelligence leaders testify on global threats to US before Senate Committee on Intelligence.
U.S. intelligence officials warn that without swift military aid, Ukraine could lose ground to Russia.