The Forever Fix, dedicated to the children of gene therapy, is a celebration of science, medicine, parent activism, and most important of all, hope.

On a bright September Sunday in 2008, 8-year-old Corey Haas walked up the pathway to the Philadelphia zoo holding his parents' hands, looked up, and screamed. It was the first time he'd seen the sun.

Four days earlier, Corey had undergone gene therapy for hereditary blindness at Children's Hospital of Philadelphia. An eye surgeon had gently placed billions of viruses bearing healing genes just beneath the rods and cones of Corey's left eye. Now, at the zoo, seeing the sun hurt.