B-52 Stratofortress in Color Screensaver v1.0
Its economy in operation and high subsonic performance compared to the rest of the USAF strategic bomber fleet has enabled it to continue to serve rather than be replaced by the Mach 3 XB-70 Valkyrie, B-1B Lancer, and stealth B-2 Spirit. In January 2005, it was the second aircraft, after the English Electric Canberra, to mark 50 years of continuous service with its original primary customer.
The USAFТ‘s Strategic Air Command had B-52 Stratofortresses in active service from 1955 through 1991, when the aircraft were assigned to the Air Combat Command. - wiki
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