In 1944, a U.S. WWII pilot crashed in England during a secret mission. A search for his remains has revealed new clues.

Metal detectors beeped across a quiet, five-acre plot of forest and field on England's eastern Suffolk coast as dozens of American and British service members sifted clumpy, wet soil from a deep impact crater. The tiniest of remains of U.S. Air Force pilot Lt. John Fisher might be here. Exactly 80 years ago Sunday - August 4, 1944 - his B-17 bomber crashed while on a secret mission targeting Nazi rocket sites in Europe during World War II.

"It can make you feel emotional, you know? They've found some personal artifacts that are very endearing," said Garret Browning, a U.S. air repair specialist from Colorado with the U.S. 100th Maintenance Squadron, currently stationed in England.

Experienced in crash damage recovery, Browning is one of about 150 American and British active duty and retired military volunteers looking for a fallen fellow soldier. At 26 years old, Browning is already older than the pilot he was looking for.

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Lt. John W. Fisher Jr., from New York, was just 21 years old when he was killed during Operation Aphrodite, the codename for flying planes on one-way missions to destroy Nazi rocket sites and submarine pens in Europe. Those planes were old, war-weary B-17 "Flying Fortress" bombers, first stripped down for more space, then loaded up with tons of explosives. But Fisher's plane stalled soon after takeoff. He pushed his co-pilot out and sacrificed himself. The plane nosedived into the ground just before the English Channel with France on the horizon.

"This aircraft, it blew apart pretty much in every direction," said Browning. "So something as small as just a bolt or a thread just kind of tells a story."

The remnants these volunteers have found include shattered bits of glass from an oxygen bottle - which might suggest Fisher's remains are nearby. The biggest and heaviest piece of debris was the central part of a propeller with much of its blades sheared off. Other pieces were fragments of the fuselage, engine and even some fabric from a parachute.

Volunteers also found a rusted horseshoe, believed to have been taken on board Fisher's B-17 for luck, and a twisted, fire-darkened nameplate reminding excavators of the origin of the plane from across the Atlantic Ocean: Detroit, General Motors Corporation.