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Silhoueted against the bright morning sky these boys are roaring in to attack the imaginery enemy. Their P 1 Curtiss planes have a wicked snarl as they hurtle toward us. Again they wheel away and the snarl drops to a dim roar and then to a distant hum as they disappear over the edge of the field.https://commons.erau.edu/charles-russell-images/1032/thumbnail.jp