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Test pilot and engineer, USA, 1920. 'Double the pilots double the trouble'. Goggles at the ready, this test pilot and engineer conducted research business high above the Langley Research Center in Virginia. In the early years the flight research team was usually made up of a test pilot (Thomas Carroll, front cockpit) and an engineer (John W. Gus Crowley, Jr.). Test pilot and engineer, USA, 1920. Creator: Unknown. (KEYSTONE/HERITAGE IMAGES/HERITAGE SPACE)