The more I think about it, the more it seems to me that an alQaeda cell is conducting a sniper operation carried our by two or three two-man teams. Such as strategy would have many advantage for alQaeda: * It would confound the police, and make their job geometrically more difficult. * Conflicting witness reports (since the witnesses are seeing different teams) would keep law enforcement scrambling and chasing false leads for a long time. * It would create a climate of terror in the population. * It would cause economic dislocation as people curtail their activities to the greatest...