James R. Holton was Professor of Atmospheric Sciences at the University of Washington until his death in 2004. A member of the National Academies of Science, during his career he was awarded every major honor available in the atmospheric sciences including AGU's Revelle Medal.Gregory J. Hakim is Professor and Chair of the Department of Atmospheric Sciences in the College of the Environment at the University of Washington. His research focuses on problems in climate reconstruction, predictability, data assimilation, atmospheric dynamics, and synoptic meteorology. He teaches courses in weather, atmospheric sciences, atmospheric structure and analysis, atmospheric motions, synoptic meteorology, balance dynamics, and weather predictability and data assimilation.