FILE - In this Dec. 2, 2012 file photo, Anderson Cooper arrives at CNN Heroes at The Shrine Auditorium, in Los Angeles. Cooper hosts a CNN special, "Self-Defense Or Murder?" regarding the trial of George Zimmerman Trial that began June 24, 2013. Both of the CNN sister networks, CNN and HLN, did well the first few nights they competed against each other to recap events in the Florida trial where neighborhood watch volunteer Zimmerman is accused of murder in the shooting death of slain teenager Trayvon Martin. (Photo by Dan Steinberg/Invision/AP, File)

Associated Press
FILE - In this Dec. 2, 2012 file photo, Anderson Cooper arrives at CNN Heroes at The Shrine Auditorium, in Los Angeles. Cooper hosts a CNN special, "Self-Defense Or Murder?" regarding the trial of George Zimmerman Trial that began June 24, 2013. Both of the CNN sister networks, CNN and HLN, did well the first few nights they competed against each other to recap events in the Florida trial where neighborhood watch volunteer Zimmerman is accused of murder in the shooting death of slain teenager Trayvon Martin. (Photo by Dan Steinberg/Invision/AP, File)
FILE - In this Dec. 2, 2012 file photo, Anderson Cooper arrives at CNN Heroes at The Shrine Auditorium, in Los Angeles. Cooper hosts a CNN special, "Self-Defense Or Murder?" regarding the trial of George Zimmerman Trial that began June 24, 2013. Both of the CNN sister networks, CNN and HLN, did well the first few nights they competed against each other to recap events in the Florida trial where neighborhood watch volunteer Zimmerman is accused of murder in the shooting death of slain teenager Trayvon Martin. (Photo by Dan Steinberg/Invision/AP, File)
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