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DALLAS, TX - JULY 12:  U.S. President Barack Obama delivers remarks during an interfaith memorial service, honoring five slain police officers, at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. A sniper opend fire following a Black Lives Matter march in Dallas killing five police officers and injuring 12 others.  (Photo by Tom Pennington/Getty Images)
DALLAS, TX - JULY 12:  U.S. President Barack Obama delivers remarks during an interfaith memorial service, honoring five slain police officers, at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. A sniper opend fire following a Black Lives Matter march in Dallas killing five police officers and injuring 12 others.  (Photo by Tom Pennington/Getty Images)

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    President Obama's entire Dallas police memorial speech

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President Obama's entire Dallas police memorial speech

President Obama called for unity during a speech at a memorial for the Dallas police officers killed following a peaceful protest march.

President Obama's entire Dallas police memorial speech

President Obama called for unity during a speech at a memorial for the Dallas police officers killed following a peaceful protest march.