On December 10, 1954, Col. John P. Stapp propelled down the Holloman High Speed Test Track aboard the Sonic Wind Rocket Sled 1 at a rate of 632 miles per hour. The purpose of this experiment was to see at what speed a pilot could safely eject. The Sonic Wind 1, the sled Stapp used for that test, is now displayed at the New Mexico Museum of Space History. (Courtesy Photo)

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Photo by: Courtesy photo |  VIRIN: 141208-F-CP123-001.JPG