Iranians share mixed feelings and expectations from high-stakes nuclear talks between Iran and the US that are set to begin in Oman today. "If nothing is meant to happen, then surely the decision to hold talks wouldn't have been made. I hope something good comes of it," says Amir, while other Tehran residents, like retiree Jafar Nemati, say they are "not at all optimistic about these negotiations". "Last time, Mr. Trump tore up the agreements, despite them being entirely in America's favour. When you're dealing with such an untrustworthy person, the whole matter is suspicious from the very beginning," he adds. IMAGES AND SOUNDBITES