they helped commit murders, trained as suicide fighters and took pictures to help plan attacks. now a cnn exclusive report. three isis members are speaking from prison. they say they regret everything they ve done. a secret jail in northern iraq. around 1,000 men are being held here. all are accused of supporting isis. kurdish authorities allowed this exclusive access. three of the captives agree to speak to us. they insist freely and without coercion about the important and very different roles they played in a recent large-scale isis attack. lat ahmed was one of the fighters who stormed kirkuk on