South Korea aims to develop its first nuclear submarine by mid-2030s

South Korea has unveiled plans to develop nuclear-powered submarines, as it looks to counter the North's growing missile threat. Officials said the programme would support an "underwater kill chain" — the ability to detect and track North Korean submarines before they can be launched. Seoul intends to launch the first vessel in the mid-2030s, and officials say it will be developed and built domestically. But the word "nuclear" raises an obvious question: Does this mean Seoul wants nuclear weapons? Grace Shin reports.