South Korean President Yoon Suk-yeol has said his country could build its own nuclear arsenal or ask for U.S. troops to redeploy if the nuclear threat from North Korea increases. It’s the first time a South Korean leader raised such a prospect since the U.S. withdrew its nuclear arms from the South in 1991. The International Campaign to Abolish Nuclear Weapons said in response, “Suggestions that rejecting agreed int’l law and norms to develop nuclear weapons are outrageous, and must be globally condemned. … Adding more nuclear weapons into an already tense region is like pouring oil onto a grease fire.”