A historic phone call Friday between the presidents of the United States and Iran could mark the end of 34 years of enmity.
Or it could be another missed opportunity.
In the weeks ahead, clear signs will emerge whether a diplomatic breakthrough is possible. Here are several key areas that could determine success or failure:
Enrichment in Iran?
Throughout his New York “charm offensive,” Iranian President Hassan Rouhani made one demand clear: Tehran will rebuff any agreement that does not allow it to enrich some uranium.
As my longtime friend, and former colleague, Scott Peterson noted in the Christian Science Monitor, Rouhani has insisted that the Iranians will not budge on this issue.
“There’s nothing we seek to hide,” Rouhani said at a meeting with American media editors, according to Peterson. “Forty countries are doing enrichment. We want nothing less, nothing more.”