Pistorius takes the stand

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An emotional Oscar Pistorius says he sometimes wakes up in terror because of the trauma of shooting his girlfriend, Reeva Steenkamp, last year.

Testifying in his own defense today, Pistorius, who claims the shooting was accidental, apologized to members of Steenkamp's family.

With a shaking voice, Pistorius said, "There hasn't been a moment since this tragedy happened that I haven't thought about your family."

The double-amputee athlete said he wanted to protect Steenkamp. He has said he killed her by mistake; prosecutors say he killed her after an argument.

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