U.S. gave up on eliminating most of Iran’s nuclear program, while Tehran took steps such as agreeing to mothball centrifuges
Top Obama administration officials entered negotiations with Iran in September 2013 hoping to dismantle most of the country’s nuclear infrastructure—but carrying gnawing doubts such an outcome was possible. Those concerns were quickly confirmed when U.S. and Iranian diplomats sat down for their first formal meeting the following month at the United Nations offices near the shores of Lake Geneva.