on their own turf. that's significant. this was incredibly risky and if any of the u.s. commandos had been captured they would have been tortured and killed as we have seen with other isis hostages. it is significant because while the isis leader abu sayyef was killed his wife was taken into custody and is talking to her interrogators. that could yield new intelligence about whether other isis fighters are and where hostages are being held. we are learning details about the operation this morning. u.s. officials say american delta force commandos took off from northern iraq in black hawk helicopters and osprey plane helicopter hybrids and flew into an isis stronghold in eastern syria. the target of the mission was abu say, yes, f, not known to most americans but u.s. officials say he was a top isis operator. he managed isis's oil and gas income. taking him down wasn't easy.