Retired SEAL Matt Bissonnette, who claimed in his controversial tell-all No Easy Day to be one of the commandos who shot bin Laden dead, wrote that the team's orders were in fact "kill or capture."
When bin Laden peeked his head from his home's top-floor bedroom a SEAL shot him in the head and teammates closed in to finish him off, Bissonnette wrote.
Obama and his inner circle maintain they gave 50-50 odds that the tall man they called "The Pacer," seen walking regularly around the compound, was their target.
Assistant Central Intelligence Agency Director Michael Morrell corroborated the 50-50 scenario. "If we had a human source who had told us directly that bin Laden was living in that compound, I still wouldn't be above 60 percent. And I'm telling you, the case for WMD wasn't just stronger-it was much stronger," Morrell told Bowden.
It was a reference to intelligence, that later proved faulty, claiming that Iraq had weapons of mass destruction before the US invasion in 2002.
Navy SEAL and Joint Special Operations Command boss Admiral William McRaven, who ran the mission, told Obama the raid itself would be easier than flying his team in and out, which he warned could get "sporty," Bowden writes.
If he had been tried in federal court, bin Laden would have faced the death penalty if convicted on charges of killing Americans.
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