Fear of a potential war and frustration over biting sanctions are high in Iran’s capital, after a last-minute decision by the US to pull back from attacking the Islamic Republic. On the surface, it was business as usual on Saturday in Tehran’s bustling Karim Khan street, a hub for printing parts and materials. “We still don’t know what’s going to happen,” said print shop manager Mehrad Farzanegan, less than 48 hours after Washington aborted a military operation against three Iranian targets in response to the Islamic Republic shooting down an unmanned US drone.