In January 2009, in his first inaugural address, Barack Obama famously directed these words to adversaries of the United States, including North Korea: “we will extend a hand if you are willing to unclench your fist.”

Pyongyang responded in the first months of the new administration with a series of provocations, throwing any potential future negotiations off track. Washington’s North Korea diplomacy in the Obama era never fully recovered.

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Pyongyang’s response to the pledge of an “extended hand” included the following: the detention and imprisonment of two U.S. journalists in the Tumen River border area with China on