Group scours Pacific for sunken battleships, lost war graves

In this June 3, 2018, photo, provided by John W. (Jack) Crawford III, retired Navy Capt. Jack Crawford signs an autograph at the Battle of Midway dinner at the Army-Navy Club in Arlington, Va. Crawford, who recently turned 100 years old, served on the USS Yorktown during the World War II Battle of Midway and survived the Yorktown's sinking. (John W. (Jack) Crawford III via AP)
In this Oct. 19, 2018, photo, provided by John W. (Jack) Crawford III, retired Navy Capt. Jack Crawford poses for a photo at his home in Rockville, Maryland. Crawford, who recently turned 100 years old, served on the USS Yorktown during the World War II Battle of Midway and survived the Yorktown's sinking. (John W. (Jack) Crawford III via AP)
In this Tuesday, Oct. 15, 2019 photo, the shoreline of Midway Atoll in the Northwestern Hawaiian Islands is shown from a landing airplane. Deep-sea explorers scouring the world's oceans for sunken World War II ships are honing in on a debris field deep in the Pacific. Weeks of grid searches around the Northwestern Hawaiian Islands already have led the research vessel Petrel to one sunken battleship, the Japanese aircraft carrier Kaga. (AP Photo/Caleb Jones)
In this Wednesday, Oct. 16, 2019, photo, Vulcan Inc. director of subsea operations of the Petrel, Rob Kraft looks at images of the Japanese aircraft carrier Kaga, off Midway Atoll in the Northwestern Hawaiian Islands. Deep-sea explorers scouring the world's oceans for sunken World War II ships are honing in on a debris field deep in the Pacific. The research vessel called the Petrel is launching underwater robots about halfway between the U.S. and Japan in search of warships from the Battle of Midway. (AP Photo/Caleb Jones)
In this Tuesday, Oct. 15, 2019 photo, a sign is shown on a damaged World War II building on Midway Atoll in the Northwestern Hawaiian Islands. Deep-sea explorers scouring the world's oceans for sunken World War II ships are honing in on a debris field deep in the Pacific. A research vessel called the Petrel is launching underwater robots about halfway between the U.S. and Japan in search of warships from the Battle of Midway. (AP Photo/Caleb Jones)
In this Wednesday, Oct. 16, 2019, photo, Vulcan Inc. director of subsea operations on the Petrel, Rob Kraft, left, looks at images of the Japanese aircraft carrier Kaga, off Midway Atoll in the Northwestern Hawaiian Islands. Deep-sea explorers scouring the world's oceans for sunken World War II ships are honing in on a debris field deep in the Pacific. Weeks of grid searches around the Northwestern Hawaiian Islands already have led the research vessel Petrel to one sunken battleship, the Japanese aircraft carrier Kaga. This week, it's investigating what could be another. (AP Photo/Caleb Jones)

MIDWAY ATOLL, Northwestern Hawaiian Islands — Deep-sea explorers scouring the world’s oceans for sunken World War II ships are focusing on debris fields deep in the Pacific, in an area where one of the most decisive battles of the time took place.