Divers explore the superstructure of the Gen. Hoyt S. Vandenberg artificial reef in the Florida Keys National Marine Sanctuary off Key West, Fla., during a preview dive for journalists May 29. The Vandenberg's hull rests on the sandy bottom in about 145 feet of water, but the 523-foot-long former U.S. Air Force missile tracking ship is so massive that its superstructure begins just 45 feet below the sea surface.
Haig Jacobs/Florida Keys News Bureau
