The U.S., Sweden and Germany are among nine participants in Playbook Merlin, a five-day exercise to ready submarine crews for ...

South Korea received U.S. approval to build a nuclear-powered attack submarine that can operate for months underwater, track ...

Japan—a key United States ally near Russia, China and North Korea—may consider developing nuclear-powered submarines amid threats posed by regional adversaries. Newsweek has contacted the Russian and ...

PHILADELPHIA (WPVI) -- President Trump announced an agreement with South Korea to build a nuclear-powered submarine in Philadelphia. The announcement, made in a social media post, says it would be ...