ALEXANDROUPOLIS, Greece (AP) — Under a low November sun, a hillside in rural Greece offered a glimpse of war in the near-future. Helicopters skimmed tree lines and infantry units scrambled across a firing range through bursts of smoke and thunderous explosions. Above them, a constellation of drones — quadcopters, fixed-wings, loitering munitions and experimental prototypes — helped coordinate the intense mock battle. Greece on Friday tested a broad range of domestically developed drones and