Leon Lederman, a Nobel Prize-winning physicist and a long-time friend of the World Science Festival, died the morning of October 3. He was 96. Lederman was known for his charm and his sense of humor as well as his scholarship. He won the 1988 Nobel Prize in Physics for his work demonstrating there is more than one kind of neutrino. He served as the director of the Fermi National Accelerator Laboratory, overseeing the construction of the Tevatron, at the time the most powerful particle accelerator in the world. Lederman has been part of the World Science Festival since its founding in 2008, when we were honored to recognize him as our first Pioneer in Science. He will be greatly missed.