Air Force report envisions a broader use of drones

Small remotely piloted planes are now used mainly to gather intelligence and fire missiles at insurgents. But over the next several decades, the Air Force envisions building larger ones that could do the work of bombers and cargo planes and even tiny ones that could spy inside a room. In a report released July 23 laying out a "flight plan" for developing pilotless systems, the Air Force also said it could eventually field swarms of drones to attack enemy targets.

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