In December, an Ohio grand jury decided not to indict two white Cleveland police officers in the fatal shooting of Tamir Rice, a black 12-year-old boy who was playing with a pellet gun. That decision prompted a protest, shown here. On Friday, former Ohio state Sen. Nina Turner, who co-chairs Ohio Gov. John Kasich's Ohio Collaborative Community-Police Advisory Board, called the Republican National Convention in Cleveland a “powder keg” and said the fatal shooting of Dallas police officers “puts more gasoline and dynamite and the match on top of all of that.” Tony Dejak AP