President Barack Obama and Iranian President Hassan Rouhani’s historic telephone call last week,in which the two discussed efforts to reach an agreement over Iran’s nuclear program,occurred just a day after the highest level face-to-face meeting in years between representatives of the United States and Iran took place on the side- lines of this year’s U.N.General Assembly meeting in New York.Secretary of State John Kerry and Iranian Foreign Minister Javad Zarif spoke together for about thirty minutes,the group known as the P5+1, which has been negotiating with Iran about its nuclear program for several years.European Union Foreign Policy chief Catherine Ashton, who chaired the P5+1-Iran meeting,announced that a new round of negotiations over Iran’s nuclear program would take place in mid-October in Geneva.Secretary of State Kerry said the meeting of the P5+1 and Iran was “constructive,”and noted that the presentation given by Foreign Minister Zarif to the group was “very different in tone and very different in the vision that he held out with respect to possibilities of the future.”Secretary Kerry noted, however, that questions concerning Iran’s nuclear program remain to be answered.“One meeting and a change in tone, which was welcome, doesn't answer those questions yet, and there's a lot of work to be done,” he said.