Screen_Shot_President_Obama_Dallas_Memorial_credit_White_House_7.12.16

U.S. President Barack Obama speaks during a memorial service following the police shootings in Dallas on July 12, 2016. Screen shot from the video recording provided by The White House.

U.S. President Barack Obama speaks during a memorial service following the police shootings in Dallas on July 12, 2016. Screen shot from the video recording provided by The White House.

U.S. President Barack Obama speaks during a memorial service following the police shootings in Dallas on July 12, 2016. Screen shot from the video recording provided by The White House.