“For the nation’s African-American police officers, being both black and “blue” can mean being caught in the midst of a cultural crossfire. America is reeling from a series of tragic public events that have unfolded in the past week: two black men fatally shot by police near St. Paul, Minnesota and Baton Rouge, Louisiana — both captured on video — and the subsequent sniper killings of five officers in Dallas during a peaceful protest in response to those slayings.”