Oil prices rose on Thursday as fresh signs of trouble in Iran peace talks as the parties hit a wall over enriched uranium. WTI crude climbed 2.2% to $100.40 while Brent gained 1.8% to $106.90 as reports emerged that Iran's Supreme Leader, Mojtaba Khamenei, has drawn a hard line on one of Washington's key demands: the removal of Iran's stockpile of highly enriched uranium. According to Reuters, Khamenei issued a directive that near-weapons-grade uranium must remain inside Iran, complicating already fragile negotiations aimed at ending the U.S.-Israeli…