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

Russia’s spy ship Yantar has been making some suspicious moves in UK waters, and the Royal Navy isn’t letting it go unnoticed. With surveillance ships, helicopters, and even a submarine in play, ...

The incident marked at least the third time in a week that Russian aircraft had been intercepted in the region.

The Russian submarine B-265 Krasnodar, cut off from the port in Syria, has docked in Algiers. It is accompanied by the ...

The Red October, featured in both a Tom Clancy novel and a movie starring Sean Connery and Alec Baldwin, seemed so genuine.

The Severodvinsk class of submarine is also known as the Yasem-M, and carries an anti-ship hypersonic missiles that can ...

Russia’s growing technological assistance has the potential to bolster North Korea’s development of ICBMs and SLBMs, ...

Russian President Vladimir Putin has issued a rare statement following the death of Pope Francis. In his Easter message, ...