fact-finding group and mission be formed to delve into the truth. do you think that the entire world has to accept what the u.s. government tells them? or do you think that perhaps a fact-finding mission is necessary to tell the world -- >> reporter: osama bin laden has taken credit, al-qaeda officials have taken credit. it seems very clear. >> translator: that's fine, but the fact-finding mission can shed light on who the perpetrators were. who is alibi, who is -- where does it exist, who was it backed by and supported. all these should come to light. where do they receive their financial resources? we like to shed light on these. how come is it that they were able to infiltrate the security layers and intelligence layers of the united states?