This is just a PR campaign, it means nothing. A real breakthrough would be if Iran stops its nuclear program, and I believe that the US sanctions are damaging their economy and that is the only reason why Iran is willing to engage in talks with the US. They realize that the old way of grandstanding is not working anymore and they need to save their economy before it totally collapses. The US and Israel should take advantage of this and make them end their nuclear program before lifting any sanctions, and they must continue to monitor them to make sure they don't restart the program after the sanctions are lifted and their economy is restored.
Car bomb in Syria's Latakia kills at least seven (Reuters)
from the article: Iranian foreign minister: The Holocaust is no myth