DescriptionUnited DC-8 N8099U descents using its thrust reversers.jpg
English: United Airlines DC-8 (N8099U) Two Segment Evaluation. In-Flight Thrust Reversing, Steep Approach Research. The thrust reversing concept was applied to the DC-8 Commercial transport to achieve the rapid descent capability required for FAA certificaiton. Note: Used in publication in Flight Research at Ames; 57 Years of Development and Validation of Aeronautical Technology NASA SP-1998-3300 fig 96
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [3]