article_snippet.sent: That fear, combined with distrust of Iran's leaders, spurred the sanctions and the Middle Eastern nation's isolation.
article_snippet.sent: That agreement followed about a decade of often failed negotiations and deep-rooted acrimony, particularly between Iran and the United States.
article_snippet.sent: Those tensions haven't disappeared, nor is there any guarantee that talks won't fall apart again over the next three months.
article_snippet.sent: On the Iranian side, Foreign Minister Javad Zarif has acknowledged that "mutual mistrust" has long plagued talks.
article_snippet.sent: Foreign Minister Javad Zarif notes Iran still has "serious differences with the United States," even after Thursday's agreement.