Well, considering you didnt link a reuters story, nobody will know. .
Oh sorry i forgot you cannot read, and did not see the part about evidence, like from a court.
At the first military commission trial last week in Guantanamo, Cuba, Navy Lieutenant Commander Timothy Stone, one of the prosecutors, told the jury that accused Al Qaeda terrorist Salim Hamdan, a Yemeni citizen, was guilty of knowing about the 9/11 attacks because he overheard a conversation between Osama Bin Laden and Al Qaeda number two man Ayman al Zawahiri concerning details of the attacks.
According to a Reuters report from the courtroom, Stone stated: “If they hadn’t shot down the fourth plane it would’ve hit the dome.”
The reference was to United 93, which crashed near Shanksville, Pennsylvania. Chief prosecutor Colonel Lawrence Morris later said that Stone was merely quoting Hamdan, however, Morris would not even concede that the “dome” reference was to the U.S. Capitol building.
Whether or not Stone was himself referring to the shoot-down of United 93 or whether he was quoting Hamdan, who was, in turn, quoting either Bin Laden or Zawahiri is immaterial. The shoot-down of United 93 is backed up by evidence in U.S. intelligence files, including those found in the super-classified CRITIC database maintained by the National Security Agency (NSA). There is little doubt that the prosecutors in Guantanamo had some form of access to CRITIC and other intelligence in preparing their case against Guantanamo detainees like Hamdan.