However, acquiring a gun is not an easy process -steps to gun ownership include a medical examination and a written test.

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Among Hamdan's other complaints was that the evidence to be presented at his trial could be in the form of unsworn written statements that could not be tested by cross examination.

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Dr. Sathyavagiswaran spent a seventh day on direct examination giving detailed testimony about the 58 autopsy photos and accompanying written reports, reviewing them injury by injury, line by line.

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But legal experts said that the presentation allowed Microsoft to delay cross-examination until after a lunch break and to allow Mr Gates to give a broad overview of his written testimony.

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