National Academy of Sciences

National Academy of Sciences, Washington, DC

 

 

National Academy of Sciences, Washington, DC

North Hall Glass Floor

National Academy of Sciences, Washington, DC

Interior All Glass Door

National Academy of Sciences, Washington, DC

Historic Window Replacement

National Academy of Sciences, Washington, DC

Channel Glass Wall

National Academy of Sciences, Washington, DC

Channel Glass and Skylight

National Academy of Sciences, Washington, DC

North Hall Glass Floor