Many Iranians are worried as the United States assembles its greatest military firepower in decades in the Middle East and the next round of talks in Geneva get closer. There is a belief that the talks on Thursday may give their country's theocracy its last chance to strike a deal with President Donald Trump. There is also a feeling of hopelessness in a country battered by decades of sanctions, heightened by Trump's 2018 decision to withdraw from Tehran's nuclear deal with world powers. Iranians also last month suffered through the bloodiest crackdown on dissent in the country's modern history, with security forces killing thousands of people and detaining tens of thousands more.