In later testimony before the 9/11 Commission, Attorney General John Ashcroft will complain, “[T]he single greatest structural cause for September 11 was the wall that segregated criminal investigators and intelligence agents.” However, on this day, Ashcroft’s Assistant Attorney General, Larry Thompson, writes a memo reaffirming the policy that is later criticized as this “wall.” [9/11 Commission, 12/8/2003; Washington Post, 4/18/2004]