Image: First YF-12 Prototype
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Description: First YF-12 Prototype Aircraft, Groom Lake Nevada, 1960
Title: First YF-12 Prototype
Credit: http://www.scribd.com/doc/48513423/A-History-of-Top-Secret-US-Aircraft-Programs
Author: United States Air Force
Permission: USGOV-PD
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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