On December 29, 2011, a Russian Delta IV submarine called the Yekaterinburg caught fire in the PD-50 dry dock at Roslyakovo, near Severomorsk in the Murmansk region. Sparks from welding on the hull ...

"There is air remaining on the underwater apparatus for a day -- one day," Capt. Igor Dygalo said on state-run Rossiya television. "The operation continues. We have a day, and intensive, active ...

Four hundred meters inside a hollowed-out mountain behind a double set of blast doors, operators sit in a darkened room at computer stations facing a bank of floor-to-ceiling screens displaying a map ...

The Russian Navy wants a total of 12 Yasen-class submarines, though none are in the all-important Black Sea Fleet for use against Ukraine.