Kerry Asserts U.S. Should Get the 'Benefit of the Doubt' on Reaching a Deal with Iran on Nuclear Weapons

Here  Probably. And if Iran can't comply, they want to hide or delay for some reason that is not likely good. See my other blog posts on Iran (at sidebar right, or search at top).
There is a limit to the time Iran has for this, and the limit is now pretty much reached, in my opinion.
They should be tradeless, isolated, and no country should buy their oil. Already.