No bombs need fall from the sky. Yet damage can be inflicted on the United States through market manipulation that would be as costly to recover from as any conventional attack. The threat of financial and commodity market manipulation is not new. What is newis the ability of a foreign government to use manipulation in a way that would cause a swift and systemic economic crisis in the United States. Such actions could be taken without ever clashing with the American military—offering those without the military capability to penetrate America’s defenses an asymmetric tactic for direct attack. That a foreign government could do so should be a major concern for all of America’s political and military strategists….