AC

MANALAPAN, Florida -- In a somber address to police officers Monday, Vice President Joe Biden mourned those killed Friday at a movie theater in Aurora, Colorado and praised the people--both in uniform and civilian--who came to the aid of the victims. "We as a nation have been there before--Columbine, Virginia Tech, Fort Hood, Tucson, September 11 and so much more," Biden said during a speech at a convention of the National Association of Police Organizations. "And just like before, we refuse to yield. We refuse to give in to our darker side." Biden quoted William Yeats, "Pray I will and sing I must, And yet I weep." He urged the audience to remember the heroism of those in the theater: a young man who was killed sheltering his girlfriend with his body, a group of people who carried one of the injured to safety, and a woman who stopped to help a stranger who had been shot. "Why do we sing, when faced with all this tragedy?" he asked, returning to Yeats. "We sing...