http://www.cfr.org/iran/coming-struggle-over-iran-nuclear-pact/p33012

The Coming Struggle Over Iran Nuclear Pact

Interviewee: George Perkovich, Vice President for Studies, Carnegie Endowment for International Peace
Interviewer: Bernard Gwertzman, Consulting Editor
May 21, 2014
Iran and the so-called P5+1 [the United States, UK, France, Russia, China, and Germany] are unlikely to reach an agreement on the former's controversial nuclear program by the stated goal of July 20, says George Perkovich, director of Carnegie's Nuclear Policy program, but he feels a partial accord is possible by the end of the year. The biggest challenge, he explains, is on the issue of uranium enrichment—Iran wants to more than double its nineteen thousand centrifuges while the P5+1 wants to limit this number to about four thousand. Perkovich says that opponents to nuclear diplomacy in both countries will likely try to leverage the missed deadline to derail the process.