• Al-Qa'ida does not follow a traditional command structure, wear uniforms, carry its arms openly, or mass its troops at the borders of the nations it attacks. Nonetheless, it possesses the demonstrated capability to strike with little notice and cause significant civilian or military casualties.

    John O. Brennan: Al-Qa'ida does not follow a traditional command structure, wear uniforms, carry its arms openly, or mass its troops at the borders of the nations it attacks.  Nonetheless, it possesses the demonstrated capability to strike with little notice and cause significant civilian or military casualties.
    "Strengthening our Security by Adhering to our Values and Laws". John O. Brennan's Speech at Harvard Law School in Cambridge, Massachusetts, obamawhitehouse.archives.gov. September 16, 2011.