Black Lives Matter demonstrators maintained their encampment, Tuesday, Nov. 24, 2015, outside the Minneapolis Police Department's Fourth Precinct in Minneapolis. The fatal shooting of Jamar Clark, an unarmed black man by a Minneapolis police officer, has pushed racial tensions in the city's small but concentrated minority community to the fore, with the police precinct besieged by the makeshift encampment and many protesters.
Black Lives Matter demonstrators maintained their encampment, Tuesday, Nov. 24, 2015, outside the Minneapolis Police Department's Fourth Precinct in Minneapolis. The fatal shooting of Jamar Clark, an unarmed black man by a Minneapolis police officer, has pushed racial tensions in the city's small but concentrated minority community to the fore, with the police precinct besieged by the makeshift encampment and many protesters. Jim Mone AP
Black Lives Matter demonstrators maintained their encampment, Tuesday, Nov. 24, 2015, outside the Minneapolis Police Department's Fourth Precinct in Minneapolis. The fatal shooting of Jamar Clark, an unarmed black man by a Minneapolis police officer, has pushed racial tensions in the city's small but concentrated minority community to the fore, with the police precinct besieged by the makeshift encampment and many protesters. Jim Mone AP

America's optimism gap: It's not what you think

November 29, 2015 12:00 AM