Gunman shot as Discovery hostages planned escape

An explosives robot is prepared and sent into the Discovery Channel networks building where police shot and killed a gunman who took hostages in Silver Spring, Md., on Wednesday, Sept. 1, 2010. (AP Photo/Jacquelyn Martin)

An explosives robot is prepared and sent into the Discovery Channel networks building where police shot and killed a gunman who took hostages in Silver Spring, Md., on Wednesday, Sept. 1, 2010. (AP Photo/Jacquelyn Martin)

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