National Geographic : 1917 Nov
©Underwood &Underwood THE GOVERNMENT'S AVIATION TRAINING SCHOOLS GROW LARGER EVERY DAY Carpenters working on new hangars. Each day the demand for more equipment and area becomes more pressing. Skilled aviators are being turned out at the various aviation training posts dotting the country. There is no fear of a recruiting drop for aviation service. The keenest enthusiasm and interest are displayed by the young students who impatiently wait to scale with sky-planes the fighting front.