(treehugger.com)—In 2001, two of Yamaki’s grandsons showed up at the Arboretum in search of the tree that had been in their family. Through a Japanese translator, the grandsons recounted the story of when the world’s first atomic bomb was dropped just two miles from their grandfather’s home. The windows were blown out, Yamaki was injured by flying glass. Ninety percent of the city was decimated, some 180,000 people were killed all told. But Yamaki’s beloved bonsais were protected by a tall wall surrounding his nursery, and miraculously, survived. The tree had been in the family for at least six generations.