A slight shift in American opinion favoring a deal with Iran is shown in a WSJ/NBC poll in July 2015 compared to the poll in April 2015. Support for reaching a nuclear deal with Iran remains stable at 36% in both polls, the opposed drops by 6 percentage points to 17% from 23%, and the percentage of people who say they do not know enough to formulate an opinion goes up to 46% from 40%. The intricacies of a nuclear technology deal and the sites involved lead to a high percentage of don't know enough to give an opinion. Factors hindering a deal include inspection of military sites, and Iranian intentions. Factors favoring reaching a deal now is the risk that this would mean Iran would go back into isolation and the opportunity to work with moderates might be lost. The Rouhani administration was an effort by voters to elect a government that could ease or remove sanctions to improve the economy and living conditions- its failure would lead to Iran losing an opportunity to open up to the world. The pressure from the U.S. Congress and Israel served to push for a verifiable and effective agreement to control development of nuclear technology for weapons systems. Behavioural factors involved are the very young population in Iran which has no memories about the period before the revolution in 1979- 70% of the population of 74 million are people under the age of 35. This group is eager for ties to the outside and could change Iran's outlook and policies int the future towards moderation. Risks in not reaching a deal also include the possibility of the Saudis developing nuclear technology and nuclear proliferation. Winners from a deal because of the flow of Iranian oil to world markets and a period of extended low oil prices are the U.S., Europe, China and India. Germany gains new markets to replace the growth in the Russian market after sanctions. Lifting of an arms embargo, an added risk in the last days of the talks, would be mitigated by making the lifting of that embargo very gradual....