Mark Dickey, a U.S. caver who was trapped in the Morca cave system in Turkey on September 7, 2023, poses for a photo in Mentone, Alabama, in a May 12, 2023 file photo provided by the National Cave ...

Rescue teams are working to extricate an American researcher after he suddenly fell ill while 3,000 feet deep inside a cave in Turkey. Mark Dickey, 40, was on an expedition last week with his ...