By Francois Murphy
VIENNA, June 15 (Reuters) - Iran and the United States say they have reached a deal to end their war, which is expected to pave the way for talks on Iran's nuclear programme. Below is an outline of the key issues they face in those talks.
WHY THE CONCERN?
Iran's uranium-enrichment programme has long caused the U.S. and its allies to worry that Tehran is at least keeping the option open of one day producing nuclear weapons, since enriched uranium can be used to fuel power plants or make the core of a nuclear bomb.
