Agreed Framework
The 1994 bargain that froze North Korea's plutonium program for eight years in exchange for oil and reactors, and whose collapse produced the bomb.
In the spring of 1994 the United States and North Korea came closer to war than at any time since 1953. Pyongyang was pulling fuel rods out of its reactor at Yongbyon, enough for several bombs, and refusing inspections; the Pentagon had drawn up strike options and estimated a resulting war could kill hundreds of thousands. Jimmy Carter, acting as a private citizen, flew to Pyongyang in June and announced a deal on live television before Washington had agreed to one. The crisis ended in Geneva on October 21, 1994 with a four-page document called the Agreed Framework.
The bargain
North Korea agreed to freeze and eventually dismantle its graphite-moderated reactors and reprocessing plant, the machinery that produces weapons-grade plutonium, to let inspectors back in, and to stay in the Non-Proliferation Treaty. In return, an international consortium called KEDO would build it two light-water reactors, a design far harder to divert for weapons, and the United States would ship 500,000 metric tons of heavy fuel oil a year until the first reactor came online. The two sides also promised to move toward normal political and economic relations.
For eight years the core of it held. The plutonium program at Yongbyon stayed frozen under IAEA monitoring and cameras, and North Korea did not produce the plutonium it otherwise would have. That is a substantial claim: without the freeze, estimates at the time suggested the North could have accumulated material for dozens of weapons by the early 2000s.
Why it fell apart
Neither side delivered its half cleanly. Congress, which had never liked the deal and had flipped to Republican control weeks after it was signed, funded the fuel oil late and grudgingly, and the reactors slipped years behind schedule. Normalization did not happen. On the other side, North Korea began secretly buying uranium enrichment equipment from Pakistan's A. Q. Khan network in the late 1990s, a route to a bomb the Agreed Framework's plutonium-focused text did not explicitly close.
In October 2002 an American delegation confronted Pyongyang with evidence of the enrichment program, and by North Korea's account the delegation was told the program existed. The Bush administration cut off the fuel oil. North Korea expelled the inspectors, cut the cameras, restarted Yongbyon, and in January 2003 became the only state ever to withdraw from the Non-Proliferation Treaty. It reprocessed the 8,000 stored fuel rods within months. Its first nuclear test came in October 2006, and the plutonium in that device almost certainly came from the rods the Agreed Framework had kept sealed.
The argument that never ends
Everything since has been a rerun of the same fight over this deal. One camp reads it as proof that agreements with Pyongyang buy real years of restraint and that the failure was America's, for slow-walking its obligations until the deal had no constituency left. The other reads it as proof that the North will pocket concessions and cheat on any text you write, so buying a freeze is buying time for the other side. Both readings shaped what came next: the six-party talks, the 2012 Leap Day deal that collapsed in weeks, and the Singapore and Hanoi summits of 2018 and 2019. The one fact both sides have to live with is that the eight years of the Agreed Framework are the only years since 1994 when North Korea's plutonium reactor was not running.