A member of the Dallas Police Choir passes the portraits of five fallen officers prior to a memorial service at the Morton H. Meyerson Symphony Center in Dallas, Tuesday, July 12, 2016. The officers, from left, Michael Krol, Brent Thompson, Lorne Ahrens, Michael Smith and Patrick Zamarripa, were killed and several others injured in a sniper attack in Dallas on Thursday night, July 7. (AP Photo/Eric Gay)
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