Hypervelocity Tunnel 9 celebrates a historic milestone this month
October marks the 20th anniversary of the Hypervelocity Wind Tunnel 9 as an Air Force facility. Tunnel 9, located at White Oak, Maryland near Silver Spring, became operational in 1976. The facility provides aerodynamic simulation critical to the development of hypersonic systems, including critical altitude regimes associated with strategic missile systems and advanced defensive interceptor systems, and hypersonic vehicle technologies. (AEDC file photo)

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Photo by: Raquel March |  VIRIN: 171016-F-0000U-001.JPG