Nuclear program of Iran
U.S. President Obama reportedly sent a letter dated 20 April 2010 to President Lula of Brazil, in which he outlined a proposal of fuel swap. While expressing skepticism that the Iranians would now be willing to accept such a deal, having provided "no credible explanation" for the previous deal's rejection, President Obama wrote "For us, Iran’s agreement to transfer 1,200 kg of Iran’s low enriched uranium (LEU) out of the country would build confidence and reduce regional tensions by substantially reducing Iran’s LEU stockpile." Turkish Prime Minister Recep Tayyip Erdogan received a similar letter. A senior U.S. official told the "Washington Post" that the letter was a response to Iran's desire to ship out its uranium piecemeal, rather than in a single batch, and that during "multiple conversations" U.S. officials made clear that Iran should also cease 20% enrichment; however, the official stated "there was no president-to-president letter laying out those broader concerns".
2009 Mir-Hossein Mousavi presidential campaign
Mir-Hossein Mousavi Khameneh (In Persian: میرحسین موسوی خامنه) served as the last Prime Minister of Iran, from 1981 to 1989, before the position of Prime Minister was abolished in the 1989's review of the Iranian constitution. Just before the Islamic Revolution, he and his wife, Zahra Rahnavard moved to the United States of America and came back to Iran right after the establishment of the Islamic Republic of Iran. After they had been admitted to the structure of the government, two of the proponents of the Islamic Republic of Iran, namely, Hassan Ayat [Ph.D. holder] and Abdolhamid Diyalameh [Ph.D. holder and an MP] went to their lengths to remove Mousavi and Rahnavard from the political structure of the government but both were suspiciously martyred. After 20 years of absence from the political scene of Iran, on March 9, 2009 he announced his candidacy in the 2009 Iranian Presidential election.
Mousavi refused to run for President in the 1997 Presidential election, which caused the reformists to turn to Mohammad Khatami, who won a landslide victory. Mousavi's wife, Zahra Rahnavard, explained in an interview that the reason for her husband not running in the 1997 election had been receiving discouraging messages from "the higher officials", a hint possibly at the Supreme Leader Ali Khamenei and/or the then President Akbar Hashemi Rafsanjani.