“Military-Age Males,” a photograph by Tomas van Houtryve from the series Blue Sky Days. For this series, van Houtryve photographed by drone the kinds of gatherings that are habitual targets for U.S. strikes, as well as sites where drones are used to nonlethal effect, such as prisons, oil fields, and the U.S.–Mexico border. This photograph shows civilian cadets assembling in formation at the Citadel Military College in Charleston, South Carolina. When assessing civilian casualties of drone strikes abroad, the U.S. government counts all military-age males within a strike zone as combatants unless there is explicit posthumous proof of their innocence. An exhibition of this work is currently on view at Anastasia Photo, in New York City. A folio of Blue Sky Days was published in the April 2014 issue of Harper’s Magazine.