For the first time, North Korea has publicly admitted sending troops to fight alongside Russia in Ukraine.

One of the U.S. Space Force's key missions is to protect the United States from Chinese and Russian spy satellites. Here's a ...

Secretary of State Marco Rubio said there are reasons to be optimistic, but also asserted there are “other issues” on which ...

MOSCOW (AP) — Russian authorities said Sunday that the suspect in the killing of a Russian general in a car bomb explosion ...

Russian authorities say the suspect in the killing of a Russian general in a car bomb explosion claimed he was paid by the ...

The British Royal Navy and NATO allies jumped into action on Saturday as a Russian warship was spotted sailing through the ...

A federal judge ordered a Venezuelan couple, accused by the Trump administration of being members of the Tren de Aragua gang, ...

Like many American leaders before him, US President Donald Trump is finding out that getting through to Russian President ...

Russia and Ukraine dispute the status of the Kursk region, which Kyiv invaded last year in a surprise and successful incursion into Russian territory.

The Russian FSB has detained a suspect in connection with the assassination of Yaroslav Moskalik, a senior Russian military officer, via a car bomb. The Kremlin blames Ukraine for the killing, but ...

Russia's FSB security service said on Saturday it had detained a suspect over the killing of a senior Russian military officer on Friday by a car bomb.

Nancy A. Youssef is a national security correspondent whose reporting has focused largely on the U.S. military and the Arab world.