On the recordJune 19, 1996
the Las Vegas Strip, as important as it is, is not the center of Government of this country. The White House and the Capitol complex is. I would also say to people within the sound of my voice, in the statement of Director Bowron of the U.S. Secret Service, about a week ago, June 7, in a House committee he testified: The Secret Service also identified a need to quantify the vulnerability of the complex to explosive detonations outside the perimeter. Southwest Research Institute, one of the oldest and largest independent, nonprofit research organizations in the United States, was selected to conduct this classified study. Their methodology involved obtaining structural data on the White House and selecting likely explosive detonation points on the streets surrounding the complex. The Director went on to explain how you can use fertilizer to blow up huge buildings, like they did the building in Oklahoma City. He went on to say: The Secret Service is committed to the use of technology in furtherance of our protective and investigative missions. Alternatives to closing Pennsylvania Avenue were examined without success. It is not that they walked in and said, ``We are going to close Pennsylvania Avenue.'' The President did not want Pennsylvania Avenue closed. He told me and told many others that. The advisory committee required full explanations of all the possible options and why the options would not work before they concurred that the avenue should be closed.
Source
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