Navy SEALS That Took Out Osama Bin Laden Expected One-Way Mission

New details emerge after former SEAL Team Six member claims credit for the fatal shot that killed the al Qaeda leader.
2:08 | 11/12/14

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Transcript for Navy SEALS That Took Out Osama Bin Laden Expected One-Way Mission
Turning now to the Navy S.E.A.L. Who claims to be the one who shot and killed Osama bin laden. Telling his story in a television interview. He revealed fascinating new details about the mission and what he did right before leave. Martha Raddatz is in Washington this morning. Good morning, Martha. Reporter: Good morning. Former Navy S.E.A.L. Rob o'neill says he has thought about the mission since that may day in 2011. Trying to figure out if it's the worst thing he has ever done, or the best thing he has ever done. The mission, high risk. The command, take out the most wanted man in the world, Osama bin laden. And rob o'neill wanted to be one of the ones to do it, no matter how dangerous. The analyst told me, if you want to get a shot at bin laden, he's on the third floor. I talked myself out of a team leader spot to stay on the help the ai want and go to the roof. That's a martyrs brigade. Reporter: In a special on fox News channel, he acknowledged it felt like a one-way mission. Not knowing if they could come back home, committed to the task. We're going to die eventually. It's worth it to kill him. He's going to die with us. Reporter: And a phone call to his father to say good-bye. I'm the last one he calls, and he's checking in. Kind of thanking me for a lot of things. He was in his truck at a Walmart down the street here. After I hung up the phone, he couldn't get out of the car for 20 minutes. There was something in the tone. O'neill even writing letters to his young children just in case. It was an speculation of wexplanation why we went. It was sad. A few times the tears hit the pages. Reporter: But face-to-face with bin laden, thinking of the mission, certain that his was the last face he saw before he fired the shots that killed the terrorist mastermind. And the letters to his kids, when he returned, he shredded

This transcript has been automatically generated and may not be 100% accurate.

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