GUNSAN, South Korea -- For 33 years until 1991, the U.S. quietly stowed nuclear warheads at its Air Force base in Gunsan, a small city on the western coast of South Korea across the Yellow Sea from China.

With the North ramping up provocations, recent surveys show that around 70% of South Koreans support the country developing its own nuclear weapons. © Illustration by Hiroko Aida
More lawmakers, voters see need for homegrown program as North's threat grows