The United States has denied an Iranian Revolutionary Guards’ claim that they downed a US spy drone, possibly part of the regime’s propaganda in the wake of mounting evidence pointing to a feverish race to develop a nuclear weapon. “The U.S. Navy has fully accounted for all unmanned air vehicles (UAV) operating in the Middle East region. Our operations in the Gulf are confined to internationally recognized water and air space,” a spokesman for U.S. Naval Forces Central Command in Bahrain told news agencies. “We have no record that we have lost any ScanEagles recently.” Iran’s state-controlled media reported Tuesday...