Memorial Service Held For Slain Dallas Police Officers

Officials, including U.S. President Barack Obama, stand during the presentation of colors during an interfaith memorial service, honoring five slain police officers, at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo by Tom Pennington/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

US President Barack Obama speaks during an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo credit Mandel Ngan/AFP/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

US President Barack Obama speaks during an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo credit Mandel Ngan/AFP/Getty Images)

Bush Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

Former US president George W. Bush speaks during an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo credit Mandel Ngan/AFP/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

Reserved seats contain American flags and police hats 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)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

Dallas Police Chief David Brown (2nd-L)and Dallas Area Rapid Transit Police Chief James Spiller (2nd-R) attend an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas.(Photo credit Mandel Ngan/AFP/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

Former first lady Laura Bush(L), former US president George W. Bush(2nd-L) and US President Barack Obama and First Lady Michelle Obama attend an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo credit Mandel Ngan/AFP/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

US President Barack Obama and First Lady Michelle Obama attend an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo credit Mandel Ngan/AFP/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

Officials, including U.S. President Barack Obama, stand during the presentation of colors during an interfaith memorial service, honoring five slain police officers, at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo by Tom Pennington/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

US President Barack Obama and First Lady Michelle Obama attend an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo credit Mandel Ngan/AFP/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

Dallas Mayor Mike Rawlings speaks at an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo credit Mandel Ngan/AFP/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

US Vice President Joe Biden(2nd-L), Jill Biden(L) and former US president George W. Bush(R) and former first lady Laura Bush attend an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo credit Mandel Ngan/AFP/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

US President Barack Obama and First Lady Michelle Obama and former US president George W. Bush and former first lady Laura Bush attend an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo credit Mandel Ngan/AFP/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

Former US president George W. Bush and former first lady Laura Bush attend an interfaith memorial service for the victims of the Dallas police shooting at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. (Photo credit Mandel Ngan/AFP/Getty Images)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

Law enforcement officers attend 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)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

Reserved seats contain American flags and police hats 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)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

DART officer Misty McBride (R) hugs a fellow officer before an interfaith memorial service, honoring five slain police officers, at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. McBride was injured when 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)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

DART officer Misty McBride (R) hugs a fellow officer before an interfaith memorial service, honoring five slain police officers, at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. McBride was injured when 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)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

DART officer Misty McBride (R) arrives at an interfaith memorial service, honoring five slain police officers, at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. McBride was injured when 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)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

Police officers arrive at 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)

Obama Addresses Interfaith Memorial Service For Fallen Dallas Police Officers

DART officer Misty McBride (R) hugs a fellow officer before an interfaith memorial service, honoring five slain police officers, at the Morton H. Meyerson Symphony Center on July 12, 2016 in Dallas, Texas. McBride was injured when 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)