 ", munitions and shipbuilding, as the country entered World War I, and during the 1920s the arrival of general aviation.Charles Albert Ducommun, one of Charles Louis Ducommun's four sons, decided early on to support an innovative aircraft designer named Donald Douglas, marking the beginning of the Company's longstanding partnership with what was to become the aerospace industry.Symbolic of this new relationship, Ducommun tubular steel flew in 1927 on the Ryan-designed Spirit of St. Louis during Charles Lindbergh's historic transatlantic flight from Long Island's Roosevelt Field to Paris.