HIROSHIMA - Shigeaki Mori, a historian and an atomic bomb survivor who met Barack Obama in 2016 during the then U.S. president's visit to Hiroshima, died at the weekend at a hospital in the Japanese city, his family said Tuesday. He was 88.

Mori was known for his decades-long efforts in investigating and identifying 12 American prisoners-of-war who were killed in the U.S. atomic bombing that devastated Hiroshima in the closing stages of World War II. He himself had survived the blast at age 8.

Related coverage: