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Continue to ChatNorthrop Grumman to build football field-sized hybrid airship https://innovationtoronto.com/northrop-grumman-to-build-football-field-sized-hybrid-airship/
Northrop Grumman to build football field-sized hybrid airship https://innovationtoronto.com/northrop-grumman-to-build-football-field-sized-hybrid-airship/