This undated photo shows the mugshot of suspect James Jay Lee.
Gunman James Jay Lee, seen in this photo from his MySpace page, wasn't a stranger to the Discovery Channel employees he terrorized — he had a history of targeting the network for its programming.
Sept. 1: A police officer looks through binoculars on the street in front of the headquarters of the Discovery Channel networks building in Silver Spring, Md. (AP)
Sept. 1: Police push people back from near the front of the headquarters of the Discovery Channel networks building in Silver Spring, Md. (AP)
Sept. 1: Police evacuate the street in Silver Spring plaza in front of the headquarters of the Discovery Channel networks building in Silver Spring, Md. (AP)
Sept. 1: Police block the street in front of the headquarters of the Discovery Channel networks building in Silver Spring, Md. (AP)
Sept. 1: Police are in front of the Discovery Channel building in Silver Spring, Md. (AP)
Sept. 1: The bomb squad is called in after a man enters the Discovery Channel building with explosives. (Fox News)
Sept. 1: An aerial shot of the Discovery Channel building in Silver Spring, Md. (Fox News)
Sept. 1: Police are on the scene for the hostage situation taking place at the Discovery Channel building in Silver Spring, Md. (Fox News)
Sept. 1: People are evacuating the Discovery Channel building in Silver Spring, Md. (Fox News)
Sept. 1: An aerial shot of the Discovery Channel building where a hostage situation is taking place. (Fox News)
Sept. 1: Police are on the scene at the hostage situation taking place at the Discovery Channel building. (Fox News)
Sept. 1: The bomb squad is called in after a man enters the Discovery Channel building with explosives. (Fox News)
Sept. 1: Police are on the scene at the hostage situation taking place at the Discovery Channel building. (Fox News)