CBS) One of America's most extraordinary manhunts culminated Thursday in the arrests of an Army veteran and a teenager, asleep at a roadside rest stop — perpetrators, authorities believe, of a bloody, three-week sniping spree that left 10 people dead, three injured and multitudes paralyzed by fear. In a late development, the AP reports that court papers filed in Seattle allege that one of the suspects, John Alen Muhammad tried to equip an assault rifle with a silencer four months ago and told a friend about the damage such a weapon could cause. Montgomery County State's Attorney Douglas Gansler said...