DALLAS, TX - JULY 12: U.S. President Barack Obama and first lady Michelle Obama embrace former U.S. President George W. Bush 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)
