Since the Islamic Revolution in Iran in 1979, the United States and Iran have been estranged and at odds. During the 1980s and 1990s, U.S. officials identified Irans support for militant Middle East groups as the primary threat posed by Iran to U.S. interests and allies. Irans nuclear program took precedence in U.S. policy after 2002 as the potential for Iran to develop a nuclear weapon increased. In 2010, the Obama Administration orchestrated broad international economic pressure on Iran to persuade it to agree to strict limits on the programpressure that contributed to the June 2013...