US Sends Nuclear Submarine to South Korea After 40 Years.

The US will send a nuclear submarine to South Korea for the first time in four decades as part of a new deterrence arrangement between Washington and Seoul. The "Washington Declaration" is designed to strengthen US deterrence commitments to South Korea in the face of persistent nuclear threats from North Korea. The declaration will also set up a new US-South Korea nuclear consultative group meant to improve nuclear-related intelligence sharing. The move comes as part of a new nuclear deterrence arrangement between the US and South Korea.