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, ...

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

A horrific missile strike has left the Ukrainian city of Sumy in ruins. Ukrainian officials said two ballistic missiles ...

Russia ’s ambassador to the UK has not denied claims the Kremlin hid spy sensors in seas around Great Britain to track UK ...

Andrei Kelin tells the BBC's Laura Kuenssberg he does not deny accusations of attempting to spy on UK nuclear submarine fleet ...

Last week, Russian sensors were found hidden in the seas surrounding Britain, which are probably intended to spy on the UK’s ...

Britain is threatened because a Russian spy ship named Yantar has been seen eyeing its underwater energy infrastructure in the North Sea.

Andrei Kelin said that while he did not deny Russia was attempting to track British submarines, he rejected the idea that ...

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Russia, a world leader in submarine and undersea technology ... surveillance capabilities following the reports of Russian spy equipment being seized in domestic waters. He insisted officials ...

The Russian Pacific Fleet, with the support of veteran organizations of submariners, discovered a sunken "Malyutka"-class submarine, identified as "M-49," in the Peter the Great Bay where it went ...