hi. >> reporter: ogura was 80 years old when the bomb was dropped in hiroshima. she was near her home about 2 1/2 kilometers from ground zero. >> buildings were just pressed down as if a giant step on the city. >> reporter: braw watched as the students heard for the first time a person who was in hiroshima describe a moment long before they were born. >> me having met someone who lived through it and hearing more details and just life stories. >> like she suggested, educating people on what happened and making sure they remember so it doesn't happen again. >> reporter: during her week-long stay in hiroshima, braw realized that the legacy of the atomic bombing is far from over. as the number of survivors dwindl dwindles, she feels a greater need to make sure their voices are heard. >> i think that the testimony of the survivors, that's very important to listen to because i think that nowadays when we think of nuclear weapons, we tend to think of them as strategically important or unimportant. but to really understand what they mean, we have to listen to what it me

keiko ogura was eight years old when america dropped its atomic bomb a mile and a half from her home. >> reporter: it was just one designed to stop world war ii and force japanese surrender. the intense heat from the explosion incinerated the centerd of the city and the woodens buildings in it.he this was the only building left standing in this part of town, and it remains today as a stark reminder of the devastation. at the hiroshima peace memorial museum, director kenji shiga showed us everyday items that became artifacts. >> this is one of the things people want to come and see. a four-year-old boy was killed while riding this tricycle. it's grim evidence of the nuclear explosion.r temperatures reached 7,000 degrees. shiga told us these personal be belongings, including an incinerated school lunchbox burned by heat waves conveys how lethal and powerful the bomb was. "today there are 16,000 nuclear weapons on earth," he said, "so it's important to take another look at what happened here."it it's difficult to tell the's story, but you feel it's a story that must be told. >> reporter: