The United States and Iran have reached an agreement to extend a ceasefire , allow shipping through the Strait of Hormuz and lift a U.S. blockade and some sanctions on Iran, sources told Reuters, but the deal has not been finalized. An agreement would represent a big step toward ending a war that has pushed the world toward an energy crisis , though the underlying dispute over Iran’s nuclear program would only be thrashed out in talks over subsequent weeks. Where are the discussions now?