The chairmen of the House and Senate intelligence committees said today they would examine allegations that the F-B-I missed warning signs of an imminent terrorist attack in the weeks prior to September 11th. The committees will also investigate the climates at the FBI, CIA and other agencies to determine why they didn't put the pieces together. Minneapolis Agent Coleen Rowley, at the FBI's field office in Minneapolis has made the latest allegation. Rowley has written a memo describing how agents were held back when they attempted to aggressively investigate the arrest of Zacarias Moussaoui. Moussaoui was taken into custody in August, weeks before the attacks. Congressman Colin Peterson, is a member of a new joint congressional intelligence committee that's looking into the 911 attacks. He says he's known about the Rowley memo for months and is concerned that it was leaked to the press. But he has praise for local F-B-I officials: