Following two days of face-to-face talks in Geneva this week, a US official briefed assembled members of the press on progress in nuclear talks between Iran and the P5 + 1 (United States, China, United Kingdom, France, Germany, and EU). The briefing revolved around a stunning revelation about the recent direction of the talks, mainly that US negotiators have apparently agreed in principle to a two-tiered set of restrictions on Iran’s nuclear program.