3 of 5: U.S. Capitol Police order people to leave the lobby of the Senate Hart Office Building on Capitol Hill in Washington, Wednesday, April 17, 2013, as a suspicious item is investigated. U.S. Capitol police are investigating the discovery of at least two suspicious envelopes in Senate office buildings across the street from the Capitol. (AP Photo/J. Scott Applewhite) (AP Photo/ J. Scott Applewhite)

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