The Defense Department is ill-prepared to deal with a future in which enemies are able to threaten U.S. forces with precision-guided weapons, currently a pinnacle of military might unique to the United States, according to the results of a recent war game sponsored by the Pentagon's secretive Office of Net Assessment. The three-day drill in early July looked 30 years into the future, pondering how American military supremacy would be challenged when precision weapons become widespread, small and cheap enough...