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UNITED STATES - APRIL 14 - Matthew Verderosa, Chief of Police for the U.S. Capitol Police, speaks about the late U.S. Capitol Police Offer Vernon Alston, on Capitol Hill, in Washington, Thursday, April 14, 2016. (Photo By Al Drago/CQ Roll Call)

UNITED STATES - APRIL 14 - Matthew Verderosa, Chief of Police for the U.S. Capitol Police, speaks about the late U.S. Capitol Police Offer Vernon Alston, on Capitol Hill, in Washington, Thursday, April 14, 2016. (Photo By Al Drago/CQ Roll Call)

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