In an image displayed by Mr. Kelly, the T-Ray scanner highlighted the body of a plainclothes officer in neon green with a gun clearly visible as a black shape.

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Hundreds of soldiers, police and plainclothes security officer equipped with fire extinguishers and anti-explosive blankets ringed the Great Hall of the People and the adjacent Tiananmen Square for the opening session.

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Officer Muskett recalled that the plainclothes agent on duty at the time was Reginald Hightower.

CNN