Russia's submarines are getting harder to find, and the Navy is sending more people to keep an eye on them

Russian naval activity around Europe is a growing concern, and the US Navy is reactivating command units to help manage its own forces in the region.

Russia's submarines are getting harder to find, and the Navy is sending more people to keep an eye on themRussian naval activity around Europe is a growing concern, and the US Navy is reactivating command units to help manage its own forces in the region.