Iran's aviation safety regulator has announced a phased reopening of its airspace, beginning with the resumption of domestic flight operations by Iran Air from Wednesday, April 22. The airspace had been closed for more than 50 days following a sharp escalation in tensions involving Iran, the United States, and Israel that peaked on February 28. Further steps toward a full reopening are contingent on progress in ongoing U.S.-Iran diplomatic talks, making the development a closely watched indicator of the broader state of relations between the two countries.