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Here’s what you need to know:

Trump hints at flexibility

• President Trump has opened the door to a phased dismantling of North Korea’s nuclear arsenal, backing away from his demand that Pyongyang abandon it completely.

The change appeared to be less of a policy shift than an effort to preserve his planned summit meeting next month with the North’s leader, Kim Jong-un, which Mr. Trump acknowledged on Tuesday could be delayed.

“There’s a very substantial chance that it won’t work out, and that’s O.K.,” he said during an Oval Office meeting with President Moon Jae-in of South Korea.