geoswan's Journal: The USA never claimed Zacarias Moussaoui was 20th hijacker?

I asked about this in a Washington Post live online today, about Zacarias Moussaoui's legal proceedings. How can the USA claim both Zacarias Moussaoui and Mohamed Al-Qahtani are the 20th hijacker?

Well, the Post columnist responded that it wasn't a US official who labelled Zacarias Moussaoui the 20th hijacker. Is that true? No US official ever called him the 20th hijacker? What about Mohamed Al-Qahtani? Have any US officials ever called him the 20th hijacker?