Flown NASA flag carried aboard the Space Shuttle Discovery on STS-26, 5.75 x 3.75, affixed to an 11 x 14 presentation certificate, reading: "This National Aeronautics and Space Administration flag was flown aboard the Orbiter 'Discovery,' STS-26, September 29-October 3, 1988, commemorating the National Space Transportation System 'Return to Flight.'" The certificate bears pre-printed facsimile signatures of two NASA administrators. In fine condition.