Over the River, Project for Arkansas River, State of Colorado is on view at the Phillips Collection as part of the current exhibit documenting Christo and Jeanne-Claude’s upcoming environmental installation in Colorado. Image copyright the artist. Arguably the most well-known husband and wife duo in today’s art world is Christo and Jeanne-Claude, the pair who wrapped the Reichstag and draped Central Park. They’re at it again, and this time, Colorado’s Arkansas River is the…