Heaven only knows what black Denver singer Rose Marie was thinking when she stood at the microphone and belted out the lyrics of the black national anthem instead of the agreed on Star Spangled Banner. The event was Denver Mayor John Hickenlooper's annual state of the city address and confab. Marie was engaged at no pay to sing the customary opening Star Spangled Banner. The black national anthem penned by civil rights legend and songwriter James Weldon Johnson a century...