its main money making tool. pentagon correspondent barra starr has more. >> president obama personally authorized the mission, sending army delta force commandos deep into eastern syria. their target? to capture a man the u.s. believes is a top operative in isis. involved for a long time in their oil and gas operations, but more recently involved in isis command and control, isis planning, potentially even being in communication with the top isis leader. now, abu saief was killed in the raid when he engaged with those u.s. military commandos. his wife wasp captured, undergoing interrogation now in iraq. she is said to have been involved in isis hostage taking operations. now, the u.s. looking at all of this, interrogating her and going through all the captured