FILE - In this Nov. 5, 2014, file photo, Brian Williams speaks at the 8th Annual Stand Up For Heroes, presented by New York Comedy Festival and The Bob Woodruff Foundation in New York. NBC News gave Williams a second chance after he was caught lying about his role in stories, while Billy Bush apparently won't get the same opportunity following his profane 2005 conversation with Donald Trump. The mistakes of Williams and Bush were different, but in both cases NBC executives needed to weigh whether it was worth rehabilitating them. (Photo by Brad Barket/Invision/AP, File)