Which famous military equipment manufacturer used the tagline "Keep 'Em Flying" during World War II to promote their aircraft production efforts?

Throughout history, military equipment manufacturers and suppliers have created memorable advertising campaigns to secure government contracts and build public support. These companies often developed iconic taglines that became synonymous with national defense and military might. This poll tests your knowledge of famous military industry advertising that shaped public perception of defense contractors during major conflicts of the 20th century.

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Curtiss-Wright Corporation
Lockheed Aircraft Company
Boeing Aircraft Company
Douglas Aircraft Company