Air and Space Building - a precursor to the Museum - in the south yard of the Smithsonian castle, 1974 [photo by... http://t.co/VoeYqBuAQa
— old_time_DC (@old_time_DC) February 9, 2015
Though this photo was taken only six years before I started working in the A&I Building, NASM had long disappeared from this site when I arrived.