ABC's Brian Ross will lead off World News tonight with the first public comment by any CIA officer involved in handling high-value Al Qaeda targets. John Kiriakou spoke exclusively to Ross about the use of interrogation techniques including water boarding. Kiriakou, who was part of the CIA team that captured and interrogated Abu Zubaydah, says subjecting him to waterboarding was torture but necessary. More of the interview can be seen on Nightline as well.