2811209318_06170a653e_o Published on December 12, 2021 in 12 December 1991: In which a Boeing 747 goes supersonic.Full resolution (1342 × 662) ← Previous Evergreen International Airlines’ Boeing 747-121, N475EV, photographed at Hellinikon International Airport, Athens, Greece, 1 January 1991. The airliner has just been converted to a freighter. (Savvas Garozis)