First of two SR-71B twin seater. Only survivor. Handed over to NASA on 25 Jul 1991 after USAF decommissioned SR-71 from Beale, became NASA #831. Last flown on 14 Oct 1997 at Edwards for the 50th anniversary of Breaking the Sound Barrier. 3968FH, more than any other Blackbird

2010, 61-7956, 831, Air Zoo, Art2007, Blackbird, Kalamazoo, NASA, SR-71B, Twin seater, USA #gallery IMG_3285

2010, 61-7956, 831, Air Zoo, Art2007, Blackbird, Kalamazoo, NASA, SR-71B, Twin seater, USA #gallery IMG_3035

2010, 61-7956, 831, Air Zoo, Art2007, Blackbird, Kalamazoo, NASA, SR-71B, Twin seater, USA #gallery pano-3049-pano-3052_-_25_

2010, 61-7956, 831, Air Zoo, Art2007, Blackbird, Kalamazoo, NASA, SR-71B, Twin seater, USA #gallery IMG_3057

2010, 61-7956, 831, Air Zoo, Art2007, Blackbird, Kalamazoo, NASA, SR-71B, Twin seater, USA #gallery IMG_3060

2010, 61-7956, 831, Air Zoo, Art2007, Blackbird, Kalamazoo, NASA, SR-71B, Twin seater, USA #gallery IMG_3192

2010, 61-7956, 831, Air Zoo, Art2007, Blackbird, Kalamazoo, NASA, SR-71B, Twin seater, USA #gallery IMG_3200

2010, 61-7956, 831, Air Zoo, Art2007, Blackbird, Kalamazoo, NASA, SR-71B, Twin seater, USA #gallery IMG_3201

2010, 61-7956, 831, Air Zoo, Art2007, Blackbird, Kalamazoo, NASA, SR-71B, Twin seater, USA #gallery IMG_3228

2010, 61-7956, 831, Air Zoo, Art2007, Blackbird, Kalamazoo, NASA, SR-71B, Twin seater, USA #gallery pano-3247-pano-3253_-_26_