The extreme difficulty of proving North Korean denuclearization

Illustration: Rebecca Zisser/Axios

President Trump has laid out what a successful outcome from his talks with North Korea looks like: "They get rid of their nukes."

But, but, but: North Korea may well make such a promise, but “it is going to be emphatically impossible to conclude definitively that North Korea has given up all of its nuclear material," James Acton, a physicist and verification expert, tells Axios. "The big challenge is not verifying the dismantlement of those they tell us” about, he says, “it’s verifying that they haven’t maintained materials secretly.”