India, April 4 --  Iranian and U.S. forces were simultaneously searching for a missing American pilot on Saturday after an F-15E fighter jet was shot down over Iran-while President Trump issued a 48-hour ultimatum warning that "all hell will reign down" on Iran if no deal is reached or the Strait of Hormuz remains closed. The search for the pilot, potentially alive and on the run inside Iranian territory, has raised the stakes of the six-week-old conflict sharply and in every direction.

What Happened to the U.S. F-15E and Where Is the Pilot?

Iranian fire brought down a two-seat U.S. F-15E Strike Eagle on Friday, confirmed by officials from both countries. Search-and-rescue operations recovered one crew member. The second remains mi...