By Sept 21, 1927, Hangar #1 at Mills Field was completed. @flySFO's first hangar was made of steel framing with galvanized-corrugated iron siding. Part of this hangar is on display in “Mills Field and the San Francisco Airport” located pre-security, in T2. https://t.co/aL3GtIF1cR . This tweet was posted on September 23, 2021.