MDA Wants To Replace 1970s HALO Fleet With Used G550s

The U.S. Missile Defense Agency (MDA) is in the market for two secondhand Gulfstream G550 business jets to replace its 1970s-vintage Gulfstream IIB test observation platforms. The agency’s unusual-looking Gulfstream-based High-Altitude Observatory (HALO) aircraft are supported by L3 Aeromet in Tulsa...

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