Thank you to Francisco Caban for posting this image on Facebook. I cleared Immigrations and Customs at National's international facility in December 1979 when returning home on National's DC-10 flight from London-Heathrow. I also got yelled at by every Customs a-hole in the facility when leaving after clearing and stopping to take a photo of passengers in line waiting to clear. If I hadn't had my Aviation Department ID on me I probably would have been detained for hours. As I recall, National paid to have two widebody gates (F11 and F15) modified to accommodate the immigrations and customs functions so that their flights could go to Concourse F instead of crowded Concourse E and the E-Satellite. Of course, shortly thereafter Pan Am overpaid to buy National in a bidding war with Texas International and Eastern Airlines and after the purchase Pan Am shut down National's brainstorm of having separate immigrations and customs.