The story of the Peace Crane
A girl named Sadako Sasaki was 2 years old when the atomic bomb dropped on Hiroshima. After the bomb she was thought to be healthy. It turns out later in her life she found out she had the atom bomb disease. Her classmates tried to made help her make 1000 paper cranes along with her. She made over 1000 paper cranes but ended up dying. http://www.buddhistcouncil.org/bodhitree/Books/Story_of_the_Peace_Crane.pdf
1000 Cranes of Hope Project
Ancient Japanese tradition promises a person who folds 1000 paper cranes will be granted a wish. Some wishes may include long life or recovery.