The final memo mentioned Zubaydah several times. It claimed that due to the enhanced interrogation techniques, Zubaydah "provided significant information on two operatives, José Padilla[, who planned to build and detonate a 'dirty bomb' in the Washington DC area." This claim is strongly disputed by Ali Soufan, the FBI interrogator who first interrogated Zubaydah following his capture, by traditional means. He said the most valuable information was gained before torture was used. Other intelligence officers have also disputed that claim. Soufan, when asked in 2009 by Senator Sheldon Whitehouse during a Congressional hearing if the memo was incorrect, testified that it was. The memo noted that not all of the waterboarding sessions were necessary for Zubaydah, since the on-scene interrogation team determined he had stopped producing actionable intelligence. The memo reads: