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A new addition to Hart Senate Office Building second street entrance as part of beefed-up security measures around the Capitol Hill during the Persian Gulf Crisis on Jan. 21, 1991. (Photo by Maureen Keating/CQ Roll Call via Getty Images)

A new addition to Hart Senate Office Building second street entrance as part of beefed-up security measures around the Capitol Hill during the Persian Gulf Crisis on Jan. 21, 1991. (Photo by Maureen Keating/CQ Roll Call via Getty Images)

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