I’ve wondered about this building for a while now and only recently got a chance to take some photos. It was built in 1940 as a Greyhound bus station and successfully saved from destruction by the Art Deco Society of Washington, according to their website. The historic structure is now part of the modern office building behind it. DC photographer Elvert Barnes recently blogged about the building and posted some photos to Flickr.
I worked kitty corner from this building with the NPS last year and I LOVED it. Every day I thought, god, what a great design that is so sympathetic to the original building.