Sandy Clark (Mouse) has been taking things apart since the age of two, and still hasn't learned to put them back together. An active member of the hacker community, her professional work includes an Air Force Flight Control computer, a simulator for NASA, singing at Carnegie Hall, and a minor in history. She is currently fulfilling a childhood dream, pursuing a Ph.D. in C.S. at the University of Pennsylvania. A founding member of Toool-USA, she also enjoys puzzles, toys, Mao (the card game), and anything that involves night vision goggles. Her research explores human scale security and the unexpected ways that systems interact.