Shrink-wrapping the skyline: Chicago architects unveil design for energy-saving 'double wall' at Cleveland federal building

With help from Chicago architects, federal officials on Thursday unveiled an innovative design that leave the exterior of Cleveland's aging federal building in place and wrap a new metal and glass skin around it. This type of design, known as a "double wall," is expected to cut energy costs and give the stolid steel-and-glass building a fresh skyline identity, making its appearance change constantly in the light. 

Check out article