While Qatar hosts the American military base from which the U.S. directs its regional war against extremism, it also owns media networks responsible for inciting many of the same extremists". Qatar also used its contacts to help negotiate peaceful exchanges of hostages for the safe evacuation of civilians from areas affected by the Syrian Civil War. In 2006, Qatar was the only UN Security Council member to vote against United Nations Security Council Resolution 1696 that called on Iran to halt its nuclear enrichment program. In April 2017, after a 12-year freeze, Qatar lifted a self-imposed ban on developing the gas field with Iran, that would require cooperation between the two countries. According to David Roberts, a Qatar foreign policy expert at King's College, London, if a conflict erupts between America and Iran, Qatar would literally be caught in the middle. "If you are Qatar, you look across the water and you think, when Iran did have the opportunity to take a few Arab islands, they did it." "Qatar needs to have the ability to peacefully go about their business of sucking all the gas out of that giant field." Iran could make that process very difficult. A senior fellow of Middle Eastern studies at the Council on Foreign Relations concludes that "There's a recognition of the general tendencies of the Gulf states to hedge their bets,"There's always a question in the back of the minds of the leadership--how much faith can they put in the U.S.?" On 27 May 2017, the newly reelected Iranian President Hassan Rouhani held a phone call with Qatar's Emir Tamim bin Hamad Al Thani. Rouhani told Qatar's emir, "The countries of the region need more cooperation and consultations to resolve the crisis in the region and we are ready to cooperate in this field." The Qatari al-Jazeera is a media organization owned by the Emir of Qatar. It is the most popular network in the Middle East, and its news network has criticized foreign governments involved in the dispute and been accused of supporting Qatari interests. The Saudi-led coalition against Qatar has demanded that al-Jazeera be shut down. Qatar has been accused of sponsoring terrorism. Some countries have faulted Qatar for funding rebel groups in Syria, including al-Qaeda's affiliate in Syria, the al-Nusra Front, although the Saudis have done the same. Both Qatar and Saudi Arabia have been involved in the CIA–led Timber Sycamore covert operation to train and arm Syrian rebels. Qatar has hosted officials from the Afghan Taliban and Hamas. Qatar defends this move by saying it is trying to act as an intermediary in regional conflicts.