WASHINGTON, Dec. 12 — A former Iraqi intelligence officer who was said to have met with the suspected leader of the Sept. 11 attacks has told American interrogators the meeting never happened, according to United States officials familiar with classified intelligence reports on the matter. Ahmad Khalil Ibrahim Samir al-Ani, the former intelligence officer, was taken into custody by the United States in July. Under questioning he has said that he did not meet with Mohamed Atta in Prague, according to the officials, who have reviewed classified debriefing reports based on the interrogations. American officials caution that Mr. Ani may...