The world's leaders have committed to creating a Global Earth Observing System - a massive network to provide a continuous and comprehensive picture of the Earth and its environment. This "system of systems" would provide an understanding of changing conditions on our planet and support decision-making affecting the world's economy. Dr. Charles Kennel, Director of SIO, will describe the U.S. contributions to this international initiative and will talk about the extensive Earth observing capabilities at SIO. (#9247)