DUBAI (Reuters) – Iran has stopped enriching uranium to 20 percent, one of the key demands of world powers in talks over Tehran’s disputed nuclear program, a senior Iranian parliamentarian was quoted as saying. There was no immediate comment from the U.N. nuclear agency in Vienna which regularly inspects Iranian nuclear sites and would likely be aware of any production halt. One diplomat in Vienna also said he was not aware of any halt to production. Any such move would come as a major surprise, as Western experts believe Iran would want to use its higher-grade enrichment as a bargaining chip to win relief from crippling sanctions. Iranian MPs have in the past made statements about Iran’s nuclear program that were later denied by the government. Hossein Naqavi Hosseini, a senior member of Iran’s parliamentary national security commission, also said Tehran had only stopped enriching uranium to levels above […]