A major rescue operation is underway in Turkey’s Taurus Mountains to bring out an American researcher who fell seriously ill nine days ago at a depth of some 1,000 meters (3,000 feet) from the entrance of one of the world’s deepest caves. An experienced cave rescuer himself, Mark Dickey is being assisted by teams of international rescuers who by Monday had brought him to 300 meters (nearly 1,000 feet) from the surface.
Here’s what to know about the caver and the rescue operation:
