Iran and the United States are held in an impasse over several key issues, blocking serious talks to end the war. James C. Reynolds and Alex Croft report

Iran's latest peace proposal demands sanctions relief, asset unfreezing, reparations, and a U.S. military withdrawal, as Pakistan warns time is running short.

The state of US-Iran negotiations was in flux early on May 22, with the sides still at odds over future control of the Strait of Hormuz and Iran’s right to enrich uranium -- among…