been used to assemble a statistical description of changes in polar clouds as a function of the Martian season (Dr. Ford, Professor Pettengill).

CSR initiated design of virtual reality display devices, restraint systems, and software tools for the International Space Station (ISS) Human Research Facility. The system supports "VOILA" (Visuomotor and Orientation Investigations in Long Duration Astronauts), a set of nine flight experiments to be conducted on the ISS in 2002-2005 (Dr. Oman). Undergraduate and graduate students performed parabolic flight experiments to evaluate the "Micro-G" wireless version of Professor Newman's Enhanced Dynamics Load Sensor experiments. Professor Young continued as Director of NASA's National Space Biomedical Research Institute, which doubled in size this past year.

The MIT/Caltech Laser Interferometer Gravitational-wave Observatory (LIGO) Laboratory is continuing with the commissioning of the 4km-longVisiting Scholar, University of Pennsylvania

Bill Cheswick is a computer security and networking researcher with over 40 years of experience. His early works were in firewalls, network perimeter defenses, and honeypots. He is also the one who coined the words "proxy" and "jail" in their current Internet meanings and is the co-author of the first full book on Internet security. Bill is a world-wide speaker and is currently a visiting scholar at the University of Pennsylvania.