Explorers find what they believe is World War II ace Richard Bong's downed plane in South Pacific...

Searchers announced Thursday they’ve discovered what they believe is the wreckage of World War II ace Richard Bong’s plane in the South Pacific.

The Richard I. Bong Veterans Historical Center in Superior, Wisconsin, and the nonprofit World War II historical preservation group Pacific Wrecks announced in March they were launching a joint search for Bong’s Lockheed P-38 Lightning fighter. Bong nicknamed the plane “Marge” after his girlfriend, Marge Vattendahl.