Is torture effective for gathering intelligence?

Aired: 12/10/2014 | 0:08:01 | Clip
While the CIA says the use of enhanced interrogation led to key insights on Osama bin Laden, critics argue that the same information can be obtained with non-abusive tactics. Does torture work as an intelligence gathering tool? Gwen Ifill gets views from former CIA official Bill Harlow and former Guantanamo prosecutor David Iglesias.