Add Yahoo as a preferred source to see more of our stories on Google. The B-21 bomber pairs cutting edge tech with a throwback aircraft design. It is based on a visionary aircraft design that dates ...
mint; multicolored; flying YB-49 Flying Wing; American Advances in Aviation; verso of pane says, "YB-49 Flying Wing / Deemed futuristic in the late '40s, the / all-wing configuration of Northrop's / ...
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