Students and postdocs (from left) Rajic Harimooth and Katherina Jungnickel with Nogly Przemyslaw (on far right), demonstrate their skills making Gas-Dynamic-Virtual Nozzles to Professor John Spence and technician Stella Lisova (center) at a BioXFEL Science and Technology Center workshop held Janunary 28, 2014 at ASU near Phoenix, Arizona (Peter Bernsten absent).