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Image Size: 5760x3840 / 10.4MB; swartzphotograph.com; dc department of commerce building handrail interior interior and arcitectural photography interior photography maryland metal fabrication multiple story staircase painted metal pensylvania avenue dc tourism photography railing stairs shickel corporation silver spring maryland stainless steel stair railing stair case stairs united therapeutics corporation vestibule washington washington dc white house visitor center
Contained in galleries: United Therapeutics