The USS Massachusetts, a Block IV Virginia-class submarine, could soon join the U.S. Navy fleet after completing its initial sea trials.

President Trump said Wednesday he's allowing South Korea to build a nuclear-powered submarine in Philadelphia.

But President Donald Trump ’s back-to-back announcements about nuclear testing and nuclear submarines on Oct. 29 during his trip to South Korea could turn the nuclear weapons world upside down.

An American nuclear submarine where one in 10 crew members is Australian has arrived at the Garden Island naval base for a month-long maintenance stopover, ahead of regular AUKUS rotations that begin in 2027.

Vladimir Putin has announced a successful test of a Poseidon nuclear-powered submarine torpedo which experts have warned is capable of causing a “radioactive tsunami”. The Russian president said the test of the weapon had been a “great success”,