An unmanned U.S. Predator drone flies over Kandahar Air Field, southern Afghanistan, on a moon-lit night. After a decade of costly conflict in Iraq and Afghanistan, the American way of war is evolving toward less brawn, more guile. Drone aircraft spy on and attack terrorists with no pilot in harm&#39;s way. Small teams of special operations troops quietly train and advise foreign forces. Viruses sent from computers to foreign networks strike silently, with no American fingerprint. (ASSOCIATED PRESS / Kirsty Wigglesworth, File)
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