Mark Schneider, senior vice president of the nonprofit think tank the International Crisis Group, later says that during a trip to Afghanistan in November 2003, he is told by US military commanders and State Department officials that they are frustrated by rules preventing them from fighting Afghanistan’s booming illegal drug trade. Author James Risen notes the US military’s rules of engagement in Afghanistan states that if US soldiers discover illegal drugs they “could” destroy them, which is “very different from issuing firm rules stating that US forces must destroy any drugs discovered.” An ex-Green Beret later claims that he was specifically ordered to ignore heroin and opium when his unit discovered them on patrol. Assistant Secretary of State Bobby Charles, who fights in vain for tougher rules of engagement (see November 2004), will later complain, “In some cases [US troops] were destroying drugs, but in others they weren’t. [Defense Secretary] Rumsfeld didn’t want drugs to become a core mission.” [Risen, 2006, pp. 152-162]