Nice article about the two north side historical hangars (that housed the old Interim Terminal) at DCA:
https://ggwash.org/view/62960/buildi...tional-airport
And this link
https://www.icloud.com/sharedalbum/#...A-3DEFBA353306 gives a nice 30 year view back through the wayback machine of how DCA, IAD and many other airports used to be laid out. cool!