US Not Discussing Nuclear Exercises with South Korea, Biden Says

"South Korean concerns and wishes are understandable, but the US won't be able to jointly discuss nuclear plans to the degree that Seoul wants. That's still a bridge way too far," said Duyeon Kim, a Seoul-based Korea specialist at the Center for a New American Security.

"I think Seoul should instead focus on asking for table top exercises that incorporate North Korean nuclear-use scenarios. Seoul would be able to learn quite a lot about American thinking if they run these exercises together, rather than hoping for nuclear planning or even nuclear sharing right now," Kim added.

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