cnn. a top suspect in the deadly attack on the u.s. mission in benghazi, multiple sources telling cnn the raid was just hours away when the decision was made to abort. let's bring in our pentagon correspondent barbara starr. she has been working the story. what are you learning? >> we all know there has been huge political pressure on the white house to go after those benghazi suspects. the ones that attacked the u.s. compound last year. killing four americans. including ambassador chris stephens. cnn learned from several horses that u.s. commandos missed a crucial opportunity earlier this month. they were in libya, delta force commandos, to grant an al qaeda operative, abu al libby when they were going to go after this guy. ahmed abu khattalah. they were going to switch to going after khattalah in benghazi. but the operation never