Researchers find second warship from WWII Battle of Midway

Rob Kraft, director of undersea operations at Vulcan Inc., reviews sonar scans of a warship from the World War II Battle of Midway that was found by the crew of the research vessel Petrel, Sunday, Oct. 20, 2019, off Midway Atoll in the Northwestern Hawaiian Islands. (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)
FILE - In this June 4, 1942 file photo provided by the U.S. Navy the USS Astoria (CA-34) steams by USS Yorktown (CV-5), shortly after the carrier had been hit by three Japanese bombs in the battle of Midway. Researchers scouring the world's oceans for sunken World War II ships are honing in on debris fields 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. (William G. Roy/U.S. Navy via AP, File)
FILE - This June 1942 file photo shows an aerial photo of a Japanese carrier maneuvering in a complete circle in an effort to escape in the Midway Islands, Hawaii. After the battle, the Army reported repeated bomb hits on the enemy carriers Kaga and Akagi, while the Navy, in listing results, said four enemy carriers were definitely sunk. 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/U.S. Army, File)
The sun rises over Vulcan Inc.'s research vessel Petrel nearly 200 miles off Midway Atoll in the Northwestern Hawaiian Islands on Friday, Oct. 18, 2019. The crew of the Petrel found the sunken remains of the Japanese aircraft carrier Kaga, which sank in the historic Battle of Midway, and are searching the vast area for other sunken warships in the coming days. (AP Photo/Caleb Jones)
Rob Kraft, director of undersea operations at Vulcan Inc., reviews sonar scans of a warship from the World War II Battle of Midway that was found by his crew on the research vessel Petrel, Sunday, Oct. 20, 2019, off Midway Atoll in the Northwestern Hawaiian Islands. (AP Photo/Caleb Jones)

MIDWAY ATOLL, Northwestern Hawaiian Islands — A crew of deep-sea explorers and historians looking for lost World War II warships have found a second Japanese aircraft carrier that went down in the historic Battle of Midway.