Also, when President Biden comes to South Korea next week, the White House has suggested that he might pay a visit to the Demilitarized Zone that separates the two Koreas.
White House Press Secretary Jen Psaki said Thursday that they're still finalizing details of his trip to Asia, but she also noted that a trip to the DMZ is something that's been done by many visiting American presidents.
She also said the U.S. believes North Korea could conduct its seventh nuclear test as soon as this month.
Biden will be in Seoul from May 20th to the 22nd for a summit with President Yoon Suk-yeol.