Nearly invisible to the enemy as it stalks the oceans depths, the USS Hartford Los Angeles-class nuclear submarine provides the US Navy with a lethal combination of stealth and firepower.
원문출처 : https://www.cnn.com/2018/03/14/politics/uss-hartford-nuclear-submarine-arctic/index.html
원문출처 : https://www.cnn.com/2018/03/14/politics/uss-hartford-nuclear-submarine-arctic/index.html