Rebun Kayo

In this July 4, 2015 photo, Rebun Kayo, Hiroshima University graduate student, finds debris from the Atomic Bomb Dome, as it is known today in the river in Hiroshima, Hiroshima Prefecture, southern Japan. Kayo has retrieved shattered bricks and stones of various sizes. A few of them are as big as a meter (3-feet) long, and had to be pulled out with a machine. Many are the size of his palm. Shells have attached to them after decades in the river. Studying inside the normally off-limits dome, he found that about 1,000 pieces matched the material and structure of the dome. (AP Photo/Eugene Hoshiko)