What challenges could stand in the way of a final US-Iran deal?

Source Summary

US-Iran war news: High-stakes talks between the U.S. and Iran begin in Switzerland. Negotiators face major challenges including Iran's nuclear program and the Strait of Hormuz. Sanctions relief and frozen assets are also key issues. Disagreements over negotiating styles and deep distrust could derail progress. A comprehensive peace deal within the 60-day window appears unlikely.