Birds fly over the Atomic Bomb Dome in Hiroshima, western Japan July 29, 2015. On August 6, 1945, the U.S. dropped the atomic bomb on Hiroshima, killing about 140,000 by the end of the year in a city of 350,000 residents, in the world's first nuclear attack. Three days later, a second atomic bomb was dropped on Nagasaki. Influenced by the shadows scorched into outdoor surfaces by the heat of the blasts 70 years ago, Reuters photographer Issei Kato pays homage to survivors, residents and historic buildings in both cities in a personal project that captures the shadows of today. (Photo by Issei Kato/Reuters)

A visitor casts a shadow on the ground at Peace Park in Nagasaki, southwestern Japan, July 31, 2015. (Photo by Issei Kato/Reuters)

Reuters photographer Issei Kato (R) and passersby cast shadows on a street in Hiroshima, western Japan July 28, 2015. (Photo by Issei Kato/Reuters)

A man casts a shadow on the ground as he sits on a bench near a street light at night near the Atomic Bomb Dome in Hiroshima, western Japan July 27, 2015. (Photo by Issei Kato/Reuters)

A mother and daughter cast shadows on a street crossing in Nagasaki, southwestern Japan, July 31, 2015. (Photo by Issei Kato/Reuters)

A mother and her son cast shadows on the ground as they pray near a cenotaph for the victims of the 1945 atomic bomb as other visitors try to take selfies, at the Peace Memorial Park in Hiroshima, western Japan July 29, 2015. (Photo by Issei Kato/Reuters)

People cast long shadows on a street they are walking down, in Hiroshima, western Japan July 28, 2015. (Photo by Issei Kato/Reuters)

Hiroshima residents cast shadows on a street as they walk in the evening, in Hiroshima, western Japan July 28, 2015. (Photo by Issei Kato/Reuters)

A couple casts shadows on a cenotaph to the mobilized students in Hiroshima, western Japan July 28, 2015. (Photo by Issei Kato/Reuters)

A Hiroshima resident riding a bicycle casts a shadow on the ground as he cycles past the Atomic Bomb Dome in Hiroshima, western Japan July 29, 2015. (Photo by Issei Kato/Reuters)

Reuters photographer Issei Kato casts a shadow on the entrance of an underground shopping complex in Hiroshima, western Japan July 28, 2015. (Photo by Issei Kato/Reuters)

A visitor holding a sunshade casts a shadow on the ground at the Peace Memorial Park in Hiroshima, western Japan July 29, 2015. (Photo by Issei Kato/Reuters)